Atomic Number = 1
Atomic Symbol = H
Mass Number = 1
Relative Atomic Mass = 1.00782503207(10)
Isotopic Composition = 0.999885(70)
Standard Atomic Weight = 1.00794(7)

Atomic Number = 1
Atomic Symbol = H
Mass Number = 2
Relative Atomic Mass = 2.0141017778(4)
Isotopic Composition = 0.000115(70)
Standard Atomic Weight = 1.00794(7)

Atomic Number = 1
Atomic Symbol = H
Mass Number = 3
Relative Atomic Mass = 3.0160492777(25)
Isotopic Composition = 
Standard Atomic Weight = 1.00794(7)

Atomic Number = 2
Atomic Symbol = He
Mass Number = 3
Relative Atomic Mass = 3.0160293191(26)
Isotopic Composition = 0.00000134(3)
Standard Atomic Weight = 4.002602(2)

Atomic Number = 2
Atomic Symbol = He
Mass Number = 4
Relative Atomic Mass = 4.00260325415(6)
Isotopic Composition = 0.99999866(3)
Standard Atomic Weight = 4.002602(2)

Atomic Number = 3
Atomic Symbol = Li
Mass Number = 6
Relative Atomic Mass = 6.015122795(16)
Isotopic Composition = 0.0759(4)
Standard Atomic Weight = 6.941(2)

Atomic Number = 3
Atomic Symbol = Li
Mass Number = 7
Relative Atomic Mass = 7.01600455(8)
Isotopic Composition = 0.9241(4)
Standard Atomic Weight = 6.941(2)

Atomic Number = 4
Atomic Symbol = Be
Mass Number = 9
Relative Atomic Mass = 9.0121822(4)
Isotopic Composition = 1.0000
Standard Atomic Weight = 9.012182(3)

Atomic Number = 5
Atomic Symbol = B
Mass Number = 10
Relative Atomic Mass = 10.0129370(4)
Isotopic Composition = 0.199(7)
Standard Atomic Weight = 10.811(7)

Atomic Number = 5
Atomic Symbol = B
Mass Number = 11
Relative Atomic Mass = 11.0093054(4)
Isotopic Composition = 0.801(7)
Standard Atomic Weight = 10.811(7)

Atomic Number = 6
Atomic Symbol = C
Mass Number = 12
Relative Atomic Mass = 12.0000000(0)
Isotopic Composition = 0.9893(8)
Standard Atomic Weight = 12.0107(8)

Atomic Number = 6
Atomic Symbol = C
Mass Number = 13
Relative Atomic Mass = 13.0033548378(10)
Isotopic Composition = 0.0107(8)
Standard Atomic Weight = 12.0107(8)

Atomic Number = 6
Atomic Symbol = C
Mass Number = 14
Relative Atomic Mass = 14.003241989(4)
Isotopic Composition = 
Standard Atomic Weight = 12.0107(8)

Atomic Number = 7
Atomic Symbol = N
Mass Number = 14
Relative Atomic Mass = 14.0030740048(6)
Isotopic Composition = 0.99636(20)
Standard Atomic Weight = 14.0067(2)

Atomic Number = 7
Atomic Symbol = N
Mass Number = 15
Relative Atomic Mass = 15.0001088982(7)
Isotopic Composition = 0.00364(20)
Standard Atomic Weight = 14.0067(2)

Atomic Number = 8
Atomic Symbol = O
Mass Number = 16
Relative Atomic Mass = 15.99491461956(16)
Isotopic Composition = 0.99757(16)
Standard Atomic Weight = 15.9994(3)

Atomic Number = 8
Atomic Symbol = O
Mass Number = 17
Relative Atomic Mass = 16.99913170(12)
Isotopic Composition = 0.00038(1)
Standard Atomic Weight = 15.9994(3)

Atomic Number = 8
Atomic Symbol = O
Mass Number = 18
Relative Atomic Mass = 17.9991610(7)
Isotopic Composition = 0.00205(14)
Standard Atomic Weight = 15.9994(3)

Atomic Number = 9
Atomic Symbol = F
Mass Number = 19
Relative Atomic Mass = 18.99840322(7)
Isotopic Composition = 1.0000
Standard Atomic Weight = 18.9984032(5)

Atomic Number = 10
Atomic Symbol = Ne
Mass Number = 20
Relative Atomic Mass = 19.9924401754(19)
Isotopic Composition = 0.9048(3)
Standard Atomic Weight = 20.1797(6)

Atomic Number = 10
Atomic Symbol = Ne
Mass Number = 21
Relative Atomic Mass = 20.99384668(4)
Isotopic Composition = 0.0027(1)
Standard Atomic Weight = 20.1797(6)

Atomic Number = 10
Atomic Symbol = Ne
Mass Number = 22
Relative Atomic Mass = 21.991385114(19)
Isotopic Composition = 0.0925(3)
Standard Atomic Weight = 20.1797(6)

Atomic Number = 11
Atomic Symbol = Na
Mass Number = 23
Relative Atomic Mass = 22.9897692809(29)
Isotopic Composition = 1.0000
Standard Atomic Weight = 22.98976928(2)

Atomic Number = 12
Atomic Symbol = Mg
Mass Number = 24
Relative Atomic Mass = 23.985041700(14)
Isotopic Composition = 0.7899(4)
Standard Atomic Weight = 24.3050(6)

Atomic Number = 12
Atomic Symbol = Mg
Mass Number = 25
Relative Atomic Mass = 24.98583692(3)
Isotopic Composition = 0.1000(1)
Standard Atomic Weight = 24.3050(6)

Atomic Number = 12
Atomic Symbol = Mg
Mass Number = 26
Relative Atomic Mass = 25.982592929(30)
Isotopic Composition = 0.1101(3)
Standard Atomic Weight = 24.3050(6)

Atomic Number = 13
Atomic Symbol = Al
Mass Number = 27
Relative Atomic Mass = 26.98153863(12)
Isotopic Composition = 1.0000
Standard Atomic Weight = 26.9815386(8)

Atomic Number = 14
Atomic Symbol = Si
Mass Number = 28
Relative Atomic Mass = 27.9769265325(19)
Isotopic Composition = 0.92223(19)
Standard Atomic Weight = 28.0855(3)

Atomic Number = 14
Atomic Symbol = Si
Mass Number = 29
Relative Atomic Mass = 28.976494700(22)
Isotopic Composition = 0.04685(8)
Standard Atomic Weight = 28.0855(3)

Atomic Number = 14
Atomic Symbol = Si
Mass Number = 30
Relative Atomic Mass = 29.97377017(3)
Isotopic Composition = 0.03092(11)
Standard Atomic Weight = 28.0855(3)

Atomic Number = 15
Atomic Symbol = P
Mass Number = 31
Relative Atomic Mass = 30.97376163(20)
Isotopic Composition = 1.0000
Standard Atomic Weight = 30.973762(2)

Atomic Number = 16
Atomic Symbol = S
Mass Number = 32
Relative Atomic Mass = 31.97207100(15)
Isotopic Composition = 0.9499(26)
Standard Atomic Weight = 32.065(5)

Atomic Number = 16
Atomic Symbol = S
Mass Number = 33
Relative Atomic Mass = 32.97145876(15)
Isotopic Composition = 0.0075(2)
Standard Atomic Weight = 32.065(5)

Atomic Number = 16
Atomic Symbol = S
Mass Number = 34
Relative Atomic Mass = 33.96786690(12)
Isotopic Composition = 0.0425(24)
Standard Atomic Weight = 32.065(5)

Atomic Number = 16
Atomic Symbol = S
Mass Number = 36
Relative Atomic Mass = 35.96708076(20)
Isotopic Composition = 0.0001(1)
Standard Atomic Weight = 32.065(5)

Atomic Number = 17
Atomic Symbol = Cl
Mass Number = 35
Relative Atomic Mass = 34.96885268(4)
Isotopic Composition = 0.7576(10)
Standard Atomic Weight = 35.453(2)

Atomic Number = 17
Atomic Symbol = Cl
Mass Number = 37
Relative Atomic Mass = 36.96590259(5)
Isotopic Composition = 0.2424(10)
Standard Atomic Weight = 35.453(2)

Atomic Number = 18
Atomic Symbol = Ar
Mass Number = 36
Relative Atomic Mass = 35.967545106(29)
Isotopic Composition = 0.003365(30)
Standard Atomic Weight = 39.948(1)

Atomic Number = 18
Atomic Symbol = Ar
Mass Number = 38
Relative Atomic Mass = 37.9627324(4)
Isotopic Composition = 0.000632(5)
Standard Atomic Weight = 39.948(1)

Atomic Number = 18
Atomic Symbol = Ar
Mass Number = 40
Relative Atomic Mass = 39.9623831225(29)
Isotopic Composition = 0.996003(30)
Standard Atomic Weight = 39.948(1)

Atomic Number = 19
Atomic Symbol = K
Mass Number = 39
Relative Atomic Mass = 38.96370668(20)
Isotopic Composition = 0.932581(44)
Standard Atomic Weight = 39.0983(1)

Atomic Number = 19
Atomic Symbol = K
Mass Number = 40
Relative Atomic Mass = 39.96399848(21)
Isotopic Composition = 0.000117(1)
Standard Atomic Weight = 39.0983(1)

Atomic Number = 19
Atomic Symbol = K
Mass Number = 41
Relative Atomic Mass = 40.96182576(21)
Isotopic Composition = 0.067302(44)
Standard Atomic Weight = 39.0983(1)

Atomic Number = 20
Atomic Symbol = Ca
Mass Number = 40
Relative Atomic Mass = 39.96259098(22)
Isotopic Composition = 0.96941(156)
Standard Atomic Weight = 40.078(4)

Atomic Number = 20
Atomic Symbol = Ca
Mass Number = 42
Relative Atomic Mass = 41.95861801(27)
Isotopic Composition = 0.00647(23)
Standard Atomic Weight = 40.078(4)

Atomic Number = 20
Atomic Symbol = Ca
Mass Number = 43
Relative Atomic Mass = 42.9587666(3)
Isotopic Composition = 0.00135(10)
Standard Atomic Weight = 40.078(4)

Atomic Number = 20
Atomic Symbol = Ca
Mass Number = 44
Relative Atomic Mass = 43.9554818(4)
Isotopic Composition = 0.02086(110)
Standard Atomic Weight = 40.078(4)

Atomic Number = 20
Atomic Symbol = Ca
Mass Number = 46
Relative Atomic Mass = 45.9536926(24)
Isotopic Composition = 0.00004(3)
Standard Atomic Weight = 40.078(4)

Atomic Number = 20
Atomic Symbol = Ca
Mass Number = 48
Relative Atomic Mass = 47.952534(4)
Isotopic Composition = 0.00187(21)
Standard Atomic Weight = 40.078(4)

Atomic Number = 21
Atomic Symbol = Sc
Mass Number = 45
Relative Atomic Mass = 44.9559119(9)
Isotopic Composition = 1.0000
Standard Atomic Weight = 44.955912(6)

Atomic Number = 22
Atomic Symbol = Ti
Mass Number = 46
Relative Atomic Mass = 45.9526316(9)
Isotopic Composition = 0.0825(3)
Standard Atomic Weight = 47.867(1)

Atomic Number = 22
Atomic Symbol = Ti
Mass Number = 47
Relative Atomic Mass = 46.9517631(9)
Isotopic Composition = 0.0744(2)
Standard Atomic Weight = 47.867(1)

Atomic Number = 22
Atomic Symbol = Ti
Mass Number = 48
Relative Atomic Mass = 47.9479463(9)
Isotopic Composition = 0.7372(3)
Standard Atomic Weight = 47.867(1)

Atomic Number = 22
Atomic Symbol = Ti
Mass Number = 49
Relative Atomic Mass = 48.9478700(9)
Isotopic Composition = 0.0541(2)
Standard Atomic Weight = 47.867(1)

Atomic Number = 22
Atomic Symbol = Ti
Mass Number = 50
Relative Atomic Mass = 49.9447912(9)
Isotopic Composition = 0.0518(2)
Standard Atomic Weight = 47.867(1)

Atomic Number = 23
Atomic Symbol = V
Mass Number = 50
Relative Atomic Mass = 49.9471585(11)
Isotopic Composition = 0.00250(4)
Standard Atomic Weight = 50.9415(1)

Atomic Number = 23
Atomic Symbol = V
Mass Number = 51
Relative Atomic Mass = 50.9439595(11)
Isotopic Composition = 0.99750(4)
Standard Atomic Weight = 50.9415(1)

Atomic Number = 24
Atomic Symbol = Cr
Mass Number = 50
Relative Atomic Mass = 49.9460442(11)
Isotopic Composition = 0.04345(13)
Standard Atomic Weight = 51.9961(6)

Atomic Number = 24
Atomic Symbol = Cr
Mass Number = 52
Relative Atomic Mass = 51.9405075(8)
Isotopic Composition = 0.83789(18)
Standard Atomic Weight = 51.9961(6)

Atomic Number = 24
Atomic Symbol = Cr
Mass Number = 53
Relative Atomic Mass = 52.9406494(8)
Isotopic Composition = 0.09501(17)
Standard Atomic Weight = 51.9961(6)

Atomic Number = 24
Atomic Symbol = Cr
Mass Number = 54
Relative Atomic Mass = 53.9388804(8)
Isotopic Composition = 0.02365(7)
Standard Atomic Weight = 51.9961(6)

Atomic Number = 25
Atomic Symbol = Mn
Mass Number = 55
Relative Atomic Mass = 54.9380451(7)
Isotopic Composition = 1.0000
Standard Atomic Weight = 54.938045(5)

Atomic Number = 26
Atomic Symbol = Fe
Mass Number = 54
Relative Atomic Mass = 53.9396105(7)
Isotopic Composition = 0.05845(35)
Standard Atomic Weight = 55.845(2)

Atomic Number = 26
Atomic Symbol = Fe
Mass Number = 56
Relative Atomic Mass = 55.9349375(7)
Isotopic Composition = 0.91754(36)
Standard Atomic Weight = 55.845(2)

Atomic Number = 26
Atomic Symbol = Fe
Mass Number = 57
Relative Atomic Mass = 56.9353940(7)
Isotopic Composition = 0.02119(10)
Standard Atomic Weight = 55.845(2)

Atomic Number = 26
Atomic Symbol = Fe
Mass Number = 58
Relative Atomic Mass = 57.9332756(8)
Isotopic Composition = 0.00282(4)
Standard Atomic Weight = 55.845(2)

Atomic Number = 27
Atomic Symbol = Co
Mass Number = 59
Relative Atomic Mass = 58.9331950(7)
Isotopic Composition = 1.0000
Standard Atomic Weight = 58.933195(5)

Atomic Number = 28
Atomic Symbol = Ni
Mass Number = 58
Relative Atomic Mass = 57.9353429(7)
Isotopic Composition = 0.680769(89)
Standard Atomic Weight = 58.6934(4)

Atomic Number = 28
Atomic Symbol = Ni
Mass Number = 60
Relative Atomic Mass = 59.9307864(7)
Isotopic Composition = 0.262231(77)
Standard Atomic Weight = 58.6934(4)

Atomic Number = 28
Atomic Symbol = Ni
Mass Number = 61
Relative Atomic Mass = 60.9310560(7)
Isotopic Composition = 0.011399(6)
Standard Atomic Weight = 58.6934(4)

Atomic Number = 28
Atomic Symbol = Ni
Mass Number = 62
Relative Atomic Mass = 61.9283451(6)
Isotopic Composition = 0.036345(17)
Standard Atomic Weight = 58.6934(4)

Atomic Number = 28
Atomic Symbol = Ni
Mass Number = 64
Relative Atomic Mass = 63.9279660(7)
Isotopic Composition = 0.009256(9)
Standard Atomic Weight = 58.6934(4)

Atomic Number = 29
Atomic Symbol = Cu
Mass Number = 63
Relative Atomic Mass = 62.9295975(6)
Isotopic Composition = 0.6915(15)
Standard Atomic Weight = 63.546(3)

Atomic Number = 29
Atomic Symbol = Cu
Mass Number = 65
Relative Atomic Mass = 64.9277895(7)
Isotopic Composition = 0.3085(15)
Standard Atomic Weight = 63.546(3)

Atomic Number = 30
Atomic Symbol = Zn
Mass Number = 64
Relative Atomic Mass = 63.9291422(7)
Isotopic Composition = 0.48268(321)
Standard Atomic Weight = 65.38(2)

Atomic Number = 30
Atomic Symbol = Zn
Mass Number = 66
Relative Atomic Mass = 65.9260334(10)
Isotopic Composition = 0.27975(77)
Standard Atomic Weight = 65.38(2)

Atomic Number = 30
Atomic Symbol = Zn
Mass Number = 67
Relative Atomic Mass = 66.9271273(10)
Isotopic Composition = 0.04102(21)
Standard Atomic Weight = 65.38(2)

Atomic Number = 30
Atomic Symbol = Zn
Mass Number = 68
Relative Atomic Mass = 67.9248442(10)
Isotopic Composition = 0.19024(123)
Standard Atomic Weight = 65.38(2)

Atomic Number = 30
Atomic Symbol = Zn
Mass Number = 70
Relative Atomic Mass = 69.9253193(21)
Isotopic Composition = 0.00631(9)
Standard Atomic Weight = 65.38(2)

Atomic Number = 31
Atomic Symbol = Ga
Mass Number = 69
Relative Atomic Mass = 68.9255736(13)
Isotopic Composition = 0.60108(9)
Standard Atomic Weight = 69.723(1)

Atomic Number = 31
Atomic Symbol = Ga
Mass Number = 71
Relative Atomic Mass = 70.9247013(11)
Isotopic Composition = 0.39892(9)
Standard Atomic Weight = 69.723(1)

Atomic Number = 32
Atomic Symbol = Ge
Mass Number = 70
Relative Atomic Mass = 69.9242474(11)
Isotopic Composition = 0.2038(18)
Standard Atomic Weight = 72.64(1)

Atomic Number = 32
Atomic Symbol = Ge
Mass Number = 72
Relative Atomic Mass = 71.9220758(18)
Isotopic Composition = 0.2731(26)
Standard Atomic Weight = 72.64(1)

Atomic Number = 32
Atomic Symbol = Ge
Mass Number = 73
Relative Atomic Mass = 72.9234589(18)
Isotopic Composition = 0.0776(8)
Standard Atomic Weight = 72.64(1)

Atomic Number = 32
Atomic Symbol = Ge
Mass Number = 74
Relative Atomic Mass = 73.9211778(18)
Isotopic Composition = 0.3672(15)
Standard Atomic Weight = 72.64(1)

Atomic Number = 32
Atomic Symbol = Ge
Mass Number = 76
Relative Atomic Mass = 75.9214026(18)
Isotopic Composition = 0.0783(7)
Standard Atomic Weight = 72.64(1)

Atomic Number = 33
Atomic Symbol = As
Mass Number = 75
Relative Atomic Mass = 74.9215965(20)
Isotopic Composition = 1.0000
Standard Atomic Weight = 74.92160(2)

Atomic Number = 34
Atomic Symbol = Se
Mass Number = 74
Relative Atomic Mass = 73.9224764(18)
Isotopic Composition = 0.0089(4)
Standard Atomic Weight = 78.96(3)

Atomic Number = 34
Atomic Symbol = Se
Mass Number = 76
Relative Atomic Mass = 75.9192136(18)
Isotopic Composition = 0.0937(29)
Standard Atomic Weight = 78.96(3)

Atomic Number = 34
Atomic Symbol = Se
Mass Number = 77
Relative Atomic Mass = 76.9199140(18)
Isotopic Composition = 0.0763(16)
Standard Atomic Weight = 78.96(3)

Atomic Number = 34
Atomic Symbol = Se
Mass Number = 78
Relative Atomic Mass = 77.9173091(18)
Isotopic Composition = 0.2377(28)
Standard Atomic Weight = 78.96(3)

Atomic Number = 34
Atomic Symbol = Se
Mass Number = 80
Relative Atomic Mass = 79.9165213(21)
Isotopic Composition = 0.4961(41)
Standard Atomic Weight = 78.96(3)

Atomic Number = 34
Atomic Symbol = Se
Mass Number = 82
Relative Atomic Mass = 81.9166994(22)
Isotopic Composition = 0.0873(22)
Standard Atomic Weight = 78.96(3)

Atomic Number = 35
Atomic Symbol = Br
Mass Number = 79
Relative Atomic Mass = 78.9183371(22)
Isotopic Composition = 0.5069(7)
Standard Atomic Weight = 79.904(1)

Atomic Number = 35
Atomic Symbol = Br
Mass Number = 81
Relative Atomic Mass = 80.9162906(21)
Isotopic Composition = 0.4931(7)
Standard Atomic Weight = 79.904(1)

Atomic Number = 36
Atomic Symbol = Kr
Mass Number = 78
Relative Atomic Mass = 77.9203648(12)
Isotopic Composition = 0.00355(3)
Standard Atomic Weight = 83.798(2)

Atomic Number = 36
Atomic Symbol = Kr
Mass Number = 80
Relative Atomic Mass = 79.9163790(16)
Isotopic Composition = 0.02286(10)
Standard Atomic Weight = 83.798(2)

Atomic Number = 36
Atomic Symbol = Kr
Mass Number = 82
Relative Atomic Mass = 81.9134836(19)
Isotopic Composition = 0.11593(31)
Standard Atomic Weight = 83.798(2)

Atomic Number = 36
Atomic Symbol = Kr
Mass Number = 83
Relative Atomic Mass = 82.914136(3)
Isotopic Composition = 0.11500(19)
Standard Atomic Weight = 83.798(2)

Atomic Number = 36
Atomic Symbol = Kr
Mass Number = 84
Relative Atomic Mass = 83.911507(3)
Isotopic Composition = 0.56987(15)
Standard Atomic Weight = 83.798(2)

Atomic Number = 36
Atomic Symbol = Kr
Mass Number = 86
Relative Atomic Mass = 85.91061073(11)
Isotopic Composition = 0.17279(41)
Standard Atomic Weight = 83.798(2)

Atomic Number = 37
Atomic Symbol = Rb
Mass Number = 85
Relative Atomic Mass = 84.911789738(12)
Isotopic Composition = 0.7217(2)
Standard Atomic Weight = 85.4678(3)

Atomic Number = 37
Atomic Symbol = Rb
Mass Number = 87
Relative Atomic Mass = 86.909180527(13)
Isotopic Composition = 0.2783(2)
Standard Atomic Weight = 85.4678(3)

Atomic Number = 38
Atomic Symbol = Sr
Mass Number = 84
Relative Atomic Mass = 83.913425(3)
Isotopic Composition = 0.0056(1)
Standard Atomic Weight = 87.62(1)

Atomic Number = 38
Atomic Symbol = Sr
Mass Number = 86
Relative Atomic Mass = 85.9092602(12)
Isotopic Composition = 0.0986(1)
Standard Atomic Weight = 87.62(1)

Atomic Number = 38
Atomic Symbol = Sr
Mass Number = 87
Relative Atomic Mass = 86.9088771(12)
Isotopic Composition = 0.0700(1)
Standard Atomic Weight = 87.62(1)

Atomic Number = 38
Atomic Symbol = Sr
Mass Number = 88
Relative Atomic Mass = 87.9056121(12)
Isotopic Composition = 0.8258(1)
Standard Atomic Weight = 87.62(1)

Atomic Number = 39
Atomic Symbol = Y
Mass Number = 89
Relative Atomic Mass = 88.9058483(27)
Isotopic Composition = 1.0000
Standard Atomic Weight = 88.90585(2)

Atomic Number = 40
Atomic Symbol = Zr
Mass Number = 90
Relative Atomic Mass = 89.9047044(25)
Isotopic Composition = 0.5145(40)
Standard Atomic Weight = 91.224(2)

Atomic Number = 40
Atomic Symbol = Zr
Mass Number = 91
Relative Atomic Mass = 90.9056458(25)
Isotopic Composition = 0.1122(5)
Standard Atomic Weight = 91.224(2)

Atomic Number = 40
Atomic Symbol = Zr
Mass Number = 92
Relative Atomic Mass = 91.9050408(25)
Isotopic Composition = 0.1715(8)
Standard Atomic Weight = 91.224(2)

Atomic Number = 40
Atomic Symbol = Zr
Mass Number = 94
Relative Atomic Mass = 93.9063152(26)
Isotopic Composition = 0.1738(28)
Standard Atomic Weight = 91.224(2)

Atomic Number = 40
Atomic Symbol = Zr
Mass Number = 96
Relative Atomic Mass = 95.9082734(30)
Isotopic Composition = 0.0280(9)
Standard Atomic Weight = 91.224(2)

Atomic Number = 41
Atomic Symbol = Nb
Mass Number = 93
Relative Atomic Mass = 92.9063781(26)
Isotopic Composition = 1.0000
Standard Atomic Weight = 92.90638(2)

Atomic Number = 42
Atomic Symbol = Mo
Mass Number = 92
Relative Atomic Mass = 91.906811(4)
Isotopic Composition = 0.1477(31)
Standard Atomic Weight = 95.96(2)

Atomic Number = 42
Atomic Symbol = Mo
Mass Number = 94
Relative Atomic Mass = 93.9050883(21)
Isotopic Composition = 0.0923(10)
Standard Atomic Weight = 95.96(2)

Atomic Number = 42
Atomic Symbol = Mo
Mass Number = 95
Relative Atomic Mass = 94.9058421(21)
Isotopic Composition = 0.1590(9)
Standard Atomic Weight = 95.96(2)

Atomic Number = 42
Atomic Symbol = Mo
Mass Number = 96
Relative Atomic Mass = 95.9046795(21)
Isotopic Composition = 0.1668(1)
Standard Atomic Weight = 95.96(2)

Atomic Number = 42
Atomic Symbol = Mo
Mass Number = 97
Relative Atomic Mass = 96.9060215(21)
Isotopic Composition = 0.0956(5)
Standard Atomic Weight = 95.96(2)

Atomic Number = 42
Atomic Symbol = Mo
Mass Number = 98
Relative Atomic Mass = 97.9054082(21)
Isotopic Composition = 0.2419(26)
Standard Atomic Weight = 95.96(2)

Atomic Number = 42
Atomic Symbol = Mo
Mass Number = 100
Relative Atomic Mass = 99.907477(6)
Isotopic Composition = 0.0967(20)
Standard Atomic Weight = 95.96(2)

Atomic Number = 43
Atomic Symbol = Tc
Mass Number = 97
Relative Atomic Mass = 96.906365(5)
Isotopic Composition = 
Standard Atomic Weight = [98]

Atomic Number = 43
Atomic Symbol = Tc
Mass Number = 98
Relative Atomic Mass = 97.907216(4)
Isotopic Composition = 
Standard Atomic Weight = [98]

Atomic Number = 43
Atomic Symbol = Tc
Mass Number = 99
Relative Atomic Mass = 98.9062547(21)
Isotopic Composition = 
Standard Atomic Weight = [98]

Atomic Number = 44
Atomic Symbol = Ru
Mass Number = 96
Relative Atomic Mass = 95.907598(8)
Isotopic Composition = 0.0554(14)
Standard Atomic Weight = 101.07(2)

Atomic Number = 44
Atomic Symbol = Ru
Mass Number = 98
Relative Atomic Mass = 97.905287(7)
Isotopic Composition = 0.0187(3)
Standard Atomic Weight = 101.07(2)

Atomic Number = 44
Atomic Symbol = Ru
Mass Number = 99
Relative Atomic Mass = 98.9059393(22)
Isotopic Composition = 0.1276(14)
Standard Atomic Weight = 101.07(2)

Atomic Number = 44
Atomic Symbol = Ru
Mass Number = 100
Relative Atomic Mass = 99.9042195(22)
Isotopic Composition = 0.1260(7)
Standard Atomic Weight = 101.07(2)

Atomic Number = 44
Atomic Symbol = Ru
Mass Number = 101
Relative Atomic Mass = 100.9055821(22)
Isotopic Composition = 0.1706(2)
Standard Atomic Weight = 101.07(2)

Atomic Number = 44
Atomic Symbol = Ru
Mass Number = 102
Relative Atomic Mass = 101.9043493(22)
Isotopic Composition = 0.3155(14)
Standard Atomic Weight = 101.07(2)

Atomic Number = 44
Atomic Symbol = Ru
Mass Number = 104
Relative Atomic Mass = 103.905433(3)
Isotopic Composition = 0.1862(27)
Standard Atomic Weight = 101.07(2)

Atomic Number = 45
Atomic Symbol = Rh
Mass Number = 103
Relative Atomic Mass = 102.905504(3)
Isotopic Composition = 1.0000
Standard Atomic Weight = 102.90550(2)

Atomic Number = 46
Atomic Symbol = Pd
Mass Number = 102
Relative Atomic Mass = 101.905609(3)
Isotopic Composition = 0.0102(1)
Standard Atomic Weight = 106.42(1)

Atomic Number = 46
Atomic Symbol = Pd
Mass Number = 104
Relative Atomic Mass = 103.904036(4)
Isotopic Composition = 0.1114(8)
Standard Atomic Weight = 106.42(1)

Atomic Number = 46
Atomic Symbol = Pd
Mass Number = 105
Relative Atomic Mass = 104.905085(4)
Isotopic Composition = 0.2233(8)
Standard Atomic Weight = 106.42(1)

Atomic Number = 46
Atomic Symbol = Pd
Mass Number = 106
Relative Atomic Mass = 105.903486(4)
Isotopic Composition = 0.2733(3)
Standard Atomic Weight = 106.42(1)

Atomic Number = 46
Atomic Symbol = Pd
Mass Number = 108
Relative Atomic Mass = 107.903892(4)
Isotopic Composition = 0.2646(9)
Standard Atomic Weight = 106.42(1)

Atomic Number = 46
Atomic Symbol = Pd
Mass Number = 110
Relative Atomic Mass = 109.905153(12)
Isotopic Composition = 0.1172(9)
Standard Atomic Weight = 106.42(1)

Atomic Number = 47
Atomic Symbol = Ag
Mass Number = 107
Relative Atomic Mass = 106.905097(5)
Isotopic Composition = 0.51839(8)
Standard Atomic Weight = 107.8682(2)

Atomic Number = 47
Atomic Symbol = Ag
Mass Number = 109
Relative Atomic Mass = 108.904752(3)
Isotopic Composition = 0.48161(8)
Standard Atomic Weight = 107.8682(2)

Atomic Number = 48
Atomic Symbol = Cd
Mass Number = 106
Relative Atomic Mass = 105.906459(6)
Isotopic Composition = 0.0125(6)
Standard Atomic Weight = 112.411(8)

Atomic Number = 48
Atomic Symbol = Cd
Mass Number = 108
Relative Atomic Mass = 107.904184(6)
Isotopic Composition = 0.0089(3)
Standard Atomic Weight = 112.411(8)

Atomic Number = 48
Atomic Symbol = Cd
Mass Number = 110
Relative Atomic Mass = 109.9030021(29)
Isotopic Composition = 0.1249(18)
Standard Atomic Weight = 112.411(8)

Atomic Number = 48
Atomic Symbol = Cd
Mass Number = 111
Relative Atomic Mass = 110.9041781(29)
Isotopic Composition = 0.1280(12)
Standard Atomic Weight = 112.411(8)

Atomic Number = 48
Atomic Symbol = Cd
Mass Number = 112
Relative Atomic Mass = 111.9027578(29)
Isotopic Composition = 0.2413(21)
Standard Atomic Weight = 112.411(8)

Atomic Number = 48
Atomic Symbol = Cd
Mass Number = 113
Relative Atomic Mass = 112.9044017(29)
Isotopic Composition = 0.1222(12)
Standard Atomic Weight = 112.411(8)

Atomic Number = 48
Atomic Symbol = Cd
Mass Number = 114
Relative Atomic Mass = 113.9033585(29)
Isotopic Composition = 0.2873(42)
Standard Atomic Weight = 112.411(8)

Atomic Number = 48
Atomic Symbol = Cd
Mass Number = 116
Relative Atomic Mass = 115.904756(3)
Isotopic Composition = 0.0749(18)
Standard Atomic Weight = 112.411(8)

Atomic Number = 49
Atomic Symbol = In
Mass Number = 113
Relative Atomic Mass = 112.904058(3)
Isotopic Composition = 0.0429(5)
Standard Atomic Weight = 114.818(3)

Atomic Number = 49
Atomic Symbol = In
Mass Number = 115
Relative Atomic Mass = 114.903878(5)
Isotopic Composition = 0.9571(5)
Standard Atomic Weight = 114.818(3)

Atomic Number = 50
Atomic Symbol = Sn
Mass Number = 112
Relative Atomic Mass = 111.904818(5)
Isotopic Composition = 0.0097(1)
Standard Atomic Weight = 118.710(7)

Atomic Number = 50
Atomic Symbol = Sn
Mass Number = 114
Relative Atomic Mass = 113.902779(3)
Isotopic Composition = 0.0066(1)
Standard Atomic Weight = 118.710(7)

Atomic Number = 50
Atomic Symbol = Sn
Mass Number = 115
Relative Atomic Mass = 114.903342(3)
Isotopic Composition = 0.0034(1)
Standard Atomic Weight = 118.710(7)

Atomic Number = 50
Atomic Symbol = Sn
Mass Number = 116
Relative Atomic Mass = 115.901741(3)
Isotopic Composition = 0.1454(9)
Standard Atomic Weight = 118.710(7)

Atomic Number = 50
Atomic Symbol = Sn
Mass Number = 117
Relative Atomic Mass = 116.902952(3)
Isotopic Composition = 0.0768(7)
Standard Atomic Weight = 118.710(7)

Atomic Number = 50
Atomic Symbol = Sn
Mass Number = 118
Relative Atomic Mass = 117.901603(3)
Isotopic Composition = 0.2422(9)
Standard Atomic Weight = 118.710(7)

Atomic Number = 50
Atomic Symbol = Sn
Mass Number = 119
Relative Atomic Mass = 118.903308(3)
Isotopic Composition = 0.0859(4)
Standard Atomic Weight = 118.710(7)

Atomic Number = 50
Atomic Symbol = Sn
Mass Number = 120
Relative Atomic Mass = 119.9021947(27)
Isotopic Composition = 0.3258(9)
Standard Atomic Weight = 118.710(7)

Atomic Number = 50
Atomic Symbol = Sn
Mass Number = 122
Relative Atomic Mass = 121.9034390(29)
Isotopic Composition = 0.0463(3)
Standard Atomic Weight = 118.710(7)

Atomic Number = 50
Atomic Symbol = Sn
Mass Number = 124
Relative Atomic Mass = 123.9052739(15)
Isotopic Composition = 0.0579(5)
Standard Atomic Weight = 118.710(7)

Atomic Number = 51
Atomic Symbol = Sb
Mass Number = 121
Relative Atomic Mass = 120.9038157(24)
Isotopic Composition = 0.5721(5)
Standard Atomic Weight = 121.760(1)

Atomic Number = 51
Atomic Symbol = Sb
Mass Number = 123
Relative Atomic Mass = 122.9042140(22)
Isotopic Composition = 0.4279(5)
Standard Atomic Weight = 121.760(1)

Atomic Number = 52
Atomic Symbol = Te
Mass Number = 120
Relative Atomic Mass = 119.904020(10)
Isotopic Composition = 0.0009(1)
Standard Atomic Weight = 127.60(3)

Atomic Number = 52
Atomic Symbol = Te
Mass Number = 122
Relative Atomic Mass = 121.9030439(16)
Isotopic Composition = 0.0255(12)
Standard Atomic Weight = 127.60(3)

Atomic Number = 52
Atomic Symbol = Te
Mass Number = 123
Relative Atomic Mass = 122.9042700(16)
Isotopic Composition = 0.0089(3)
Standard Atomic Weight = 127.60(3)

Atomic Number = 52
Atomic Symbol = Te
Mass Number = 124
Relative Atomic Mass = 123.9028179(16)
Isotopic Composition = 0.0474(14)
Standard Atomic Weight = 127.60(3)

Atomic Number = 52
Atomic Symbol = Te
Mass Number = 125
Relative Atomic Mass = 124.9044307(16)
Isotopic Composition = 0.0707(15)
Standard Atomic Weight = 127.60(3)

Atomic Number = 52
Atomic Symbol = Te
Mass Number = 126
Relative Atomic Mass = 125.9033117(16)
Isotopic Composition = 0.1884(25)
Standard Atomic Weight = 127.60(3)

Atomic Number = 52
Atomic Symbol = Te
Mass Number = 128
Relative Atomic Mass = 127.9044631(19)
Isotopic Composition = 0.3174(8)
Standard Atomic Weight = 127.60(3)

Atomic Number = 52
Atomic Symbol = Te
Mass Number = 130
Relative Atomic Mass = 129.9062244(21)
Isotopic Composition = 0.3408(62)
Standard Atomic Weight = 127.60(3)

Atomic Number = 53
Atomic Symbol = I
Mass Number = 127
Relative Atomic Mass = 126.904473(4)
Isotopic Composition = 1.0000
Standard Atomic Weight = 126.90447(3)

Atomic Number = 54
Atomic Symbol = Xe
Mass Number = 124
Relative Atomic Mass = 123.9058930(20)
Isotopic Composition = 0.000952(3)
Standard Atomic Weight = 131.293(6)

Atomic Number = 54
Atomic Symbol = Xe
Mass Number = 126
Relative Atomic Mass = 125.904274(7)
Isotopic Composition = 0.000890(2)
Standard Atomic Weight = 131.293(6)

Atomic Number = 54
Atomic Symbol = Xe
Mass Number = 128
Relative Atomic Mass = 127.9035313(15)
Isotopic Composition = 0.019102(8)
Standard Atomic Weight = 131.293(6)

Atomic Number = 54
Atomic Symbol = Xe
Mass Number = 129
Relative Atomic Mass = 128.9047794(8)
Isotopic Composition = 0.264006(82)
Standard Atomic Weight = 131.293(6)

Atomic Number = 54
Atomic Symbol = Xe
Mass Number = 130
Relative Atomic Mass = 129.9035080(8)
Isotopic Composition = 0.040710(13)
Standard Atomic Weight = 131.293(6)

Atomic Number = 54
Atomic Symbol = Xe
Mass Number = 131
Relative Atomic Mass = 130.9050824(10)
Isotopic Composition = 0.212324(30)
Standard Atomic Weight = 131.293(6)

Atomic Number = 54
Atomic Symbol = Xe
Mass Number = 132
Relative Atomic Mass = 131.9041535(10)
Isotopic Composition = 0.269086(33)
Standard Atomic Weight = 131.293(6)

Atomic Number = 54
Atomic Symbol = Xe
Mass Number = 134
Relative Atomic Mass = 133.9053945(9)
Isotopic Composition = 0.104357(21)
Standard Atomic Weight = 131.293(6)

Atomic Number = 54
Atomic Symbol = Xe
Mass Number = 136
Relative Atomic Mass = 135.907219(8)
Isotopic Composition = 0.088573(44)
Standard Atomic Weight = 131.293(6)

Atomic Number = 55
Atomic Symbol = Cs
Mass Number = 133
Relative Atomic Mass = 132.905451933(24)
Isotopic Composition = 1.0000
Standard Atomic Weight = 132.9054519(2)

Atomic Number = 56
Atomic Symbol = Ba
Mass Number = 130
Relative Atomic Mass = 129.9063208(30)
Isotopic Composition = 0.00106(1)
Standard Atomic Weight = 137.327(7)

Atomic Number = 56
Atomic Symbol = Ba
Mass Number = 132
Relative Atomic Mass = 131.9050613(11)
Isotopic Composition = 0.00101(1)
Standard Atomic Weight = 137.327(7)

Atomic Number = 56
Atomic Symbol = Ba
Mass Number = 134
Relative Atomic Mass = 133.9045084(4)
Isotopic Composition = 0.02417(18)
Standard Atomic Weight = 137.327(7)

Atomic Number = 56
Atomic Symbol = Ba
Mass Number = 135
Relative Atomic Mass = 134.9056886(4)
Isotopic Composition = 0.06592(12)
Standard Atomic Weight = 137.327(7)

Atomic Number = 56
Atomic Symbol = Ba
Mass Number = 136
Relative Atomic Mass = 135.9045759(4)
Isotopic Composition = 0.07854(24)
Standard Atomic Weight = 137.327(7)

Atomic Number = 56
Atomic Symbol = Ba
Mass Number = 137
Relative Atomic Mass = 136.9058274(5)
Isotopic Composition = 0.11232(24)
Standard Atomic Weight = 137.327(7)

Atomic Number = 56
Atomic Symbol = Ba
Mass Number = 138
Relative Atomic Mass = 137.9052472(5)
Isotopic Composition = 0.71698(42)
Standard Atomic Weight = 137.327(7)

Atomic Number = 57
Atomic Symbol = La
Mass Number = 138
Relative Atomic Mass = 137.907112(4)
Isotopic Composition = 0.00090(1)
Standard Atomic Weight = 138.90547(7)

Atomic Number = 57
Atomic Symbol = La
Mass Number = 139
Relative Atomic Mass = 138.9063533(26)
Isotopic Composition = 0.99910(1)
Standard Atomic Weight = 138.90547(7)

Atomic Number = 58
Atomic Symbol = Ce
Mass Number = 136
Relative Atomic Mass = 135.907172(14)
Isotopic Composition = 0.00185(2)
Standard Atomic Weight = 140.116(1)

Atomic Number = 58
Atomic Symbol = Ce
Mass Number = 138
Relative Atomic Mass = 137.905991(11)
Isotopic Composition = 0.00251(2)
Standard Atomic Weight = 140.116(1)

Atomic Number = 58
Atomic Symbol = Ce
Mass Number = 140
Relative Atomic Mass = 139.9054387(26)
Isotopic Composition = 0.88450(51)
Standard Atomic Weight = 140.116(1)

Atomic Number = 58
Atomic Symbol = Ce
Mass Number = 142
Relative Atomic Mass = 141.909244(3)
Isotopic Composition = 0.11114(51)
Standard Atomic Weight = 140.116(1)

Atomic Number = 59
Atomic Symbol = Pr
Mass Number = 141
Relative Atomic Mass = 140.9076528(26)
Isotopic Composition = 1.0000
Standard Atomic Weight = 140.90765(2)

Atomic Number = 60
Atomic Symbol = Nd
Mass Number = 142
Relative Atomic Mass = 141.9077233(25)
Isotopic Composition = 0.272(5)
Standard Atomic Weight = 144.242(3)

Atomic Number = 60
Atomic Symbol = Nd
Mass Number = 143
Relative Atomic Mass = 142.9098143(25)
Isotopic Composition = 0.122(2)
Standard Atomic Weight = 144.242(3)

Atomic Number = 60
Atomic Symbol = Nd
Mass Number = 144
Relative Atomic Mass = 143.9100873(25)
Isotopic Composition = 0.238(3)
Standard Atomic Weight = 144.242(3)

Atomic Number = 60
Atomic Symbol = Nd
Mass Number = 145
Relative Atomic Mass = 144.9125736(25)
Isotopic Composition = 0.083(1)
Standard Atomic Weight = 144.242(3)

Atomic Number = 60
Atomic Symbol = Nd
Mass Number = 146
Relative Atomic Mass = 145.9131169(25)
Isotopic Composition = 0.172(3)
Standard Atomic Weight = 144.242(3)

Atomic Number = 60
Atomic Symbol = Nd
Mass Number = 148
Relative Atomic Mass = 147.916893(3)
Isotopic Composition = 0.057(1)
Standard Atomic Weight = 144.242(3)

Atomic Number = 60
Atomic Symbol = Nd
Mass Number = 150
Relative Atomic Mass = 149.920891(3)
Isotopic Composition = 0.056(2)
Standard Atomic Weight = 144.242(3)

Atomic Number = 61
Atomic Symbol = Pm
Mass Number = 145
Relative Atomic Mass = 144.912749(3)
Isotopic Composition = 
Standard Atomic Weight = [145]

Atomic Number = 61
Atomic Symbol = Pm
Mass Number = 147
Relative Atomic Mass = 146.9151385(26)
Isotopic Composition = 
Standard Atomic Weight = [145]

Atomic Number = 62
Atomic Symbol = Sm
Mass Number = 144
Relative Atomic Mass = 143.911999(3)
Isotopic Composition = 0.0307(7)
Standard Atomic Weight = 150.36(2)

Atomic Number = 62
Atomic Symbol = Sm
Mass Number = 147
Relative Atomic Mass = 146.9148979(26)
Isotopic Composition = 0.1499(18)
Standard Atomic Weight = 150.36(2)

Atomic Number = 62
Atomic Symbol = Sm
Mass Number = 148
Relative Atomic Mass = 147.9148227(26)
Isotopic Composition = 0.1124(10)
Standard Atomic Weight = 150.36(2)

Atomic Number = 62
Atomic Symbol = Sm
Mass Number = 149
Relative Atomic Mass = 148.9171847(26)
Isotopic Composition = 0.1382(7)
Standard Atomic Weight = 150.36(2)

Atomic Number = 62
Atomic Symbol = Sm
Mass Number = 150
Relative Atomic Mass = 149.9172755(26)
Isotopic Composition = 0.0738(1)
Standard Atomic Weight = 150.36(2)

Atomic Number = 62
Atomic Symbol = Sm
Mass Number = 152
Relative Atomic Mass = 151.9197324(27)
Isotopic Composition = 0.2675(16)
Standard Atomic Weight = 150.36(2)

Atomic Number = 62
Atomic Symbol = Sm
Mass Number = 154
Relative Atomic Mass = 153.9222093(27)
Isotopic Composition = 0.2275(29)
Standard Atomic Weight = 150.36(2)

Atomic Number = 63
Atomic Symbol = Eu
Mass Number = 151
Relative Atomic Mass = 150.9198502(26)
Isotopic Composition = 0.4781(6)
Standard Atomic Weight = 151.964(1)

Atomic Number = 63
Atomic Symbol = Eu
Mass Number = 153
Relative Atomic Mass = 152.9212303(26)
Isotopic Composition = 0.5219(6)
Standard Atomic Weight = 151.964(1)

Atomic Number = 64
Atomic Symbol = Gd
Mass Number = 152
Relative Atomic Mass = 151.9197910(27)
Isotopic Composition = 0.0020(1)
Standard Atomic Weight = 157.25(3)

Atomic Number = 64
Atomic Symbol = Gd
Mass Number = 154
Relative Atomic Mass = 153.9208656(27)
Isotopic Composition = 0.0218(3)
Standard Atomic Weight = 157.25(3)

Atomic Number = 64
Atomic Symbol = Gd
Mass Number = 155
Relative Atomic Mass = 154.9226220(27)
Isotopic Composition = 0.1480(12)
Standard Atomic Weight = 157.25(3)

Atomic Number = 64
Atomic Symbol = Gd
Mass Number = 156
Relative Atomic Mass = 155.9221227(27)
Isotopic Composition = 0.2047(9)
Standard Atomic Weight = 157.25(3)

Atomic Number = 64
Atomic Symbol = Gd
Mass Number = 157
Relative Atomic Mass = 156.9239601(27)
Isotopic Composition = 0.1565(2)
Standard Atomic Weight = 157.25(3)

Atomic Number = 64
Atomic Symbol = Gd
Mass Number = 158
Relative Atomic Mass = 157.9241039(27)
Isotopic Composition = 0.2484(7)
Standard Atomic Weight = 157.25(3)

Atomic Number = 64
Atomic Symbol = Gd
Mass Number = 160
Relative Atomic Mass = 159.9270541(27)
Isotopic Composition = 0.2186(19)
Standard Atomic Weight = 157.25(3)

Atomic Number = 65
Atomic Symbol = Tb
Mass Number = 159
Relative Atomic Mass = 158.9253468(27)
Isotopic Composition = 1.0000
Standard Atomic Weight = 158.92535(2)

Atomic Number = 66
Atomic Symbol = Dy
Mass Number = 156
Relative Atomic Mass = 155.924283(7)
Isotopic Composition = 0.00056(3)
Standard Atomic Weight = 162.500(1)

Atomic Number = 66
Atomic Symbol = Dy
Mass Number = 158
Relative Atomic Mass = 157.924409(4)
Isotopic Composition = 0.00095(3)
Standard Atomic Weight = 162.500(1)

Atomic Number = 66
Atomic Symbol = Dy
Mass Number = 160
Relative Atomic Mass = 159.9251975(27)
Isotopic Composition = 0.02329(18)
Standard Atomic Weight = 162.500(1)

Atomic Number = 66
Atomic Symbol = Dy
Mass Number = 161
Relative Atomic Mass = 160.9269334(27)
Isotopic Composition = 0.18889(42)
Standard Atomic Weight = 162.500(1)

Atomic Number = 66
Atomic Symbol = Dy
Mass Number = 162
Relative Atomic Mass = 161.9267984(27)
Isotopic Composition = 0.25475(36)
Standard Atomic Weight = 162.500(1)

Atomic Number = 66
Atomic Symbol = Dy
Mass Number = 163
Relative Atomic Mass = 162.9287312(27)
Isotopic Composition = 0.24896(42)
Standard Atomic Weight = 162.500(1)

Atomic Number = 66
Atomic Symbol = Dy
Mass Number = 164
Relative Atomic Mass = 163.9291748(27)
Isotopic Composition = 0.28260(54)
Standard Atomic Weight = 162.500(1)

Atomic Number = 67
Atomic Symbol = Ho
Mass Number = 165
Relative Atomic Mass = 164.9303221(27)
Isotopic Composition = 1.0000
Standard Atomic Weight = 164.93032(2)

Atomic Number = 68
Atomic Symbol = Er
Mass Number = 162
Relative Atomic Mass = 161.928778(4)
Isotopic Composition = 0.00139(5)
Standard Atomic Weight = 167.259(3)

Atomic Number = 68
Atomic Symbol = Er
Mass Number = 164
Relative Atomic Mass = 163.929200(3)
Isotopic Composition = 0.01601(3)
Standard Atomic Weight = 167.259(3)

Atomic Number = 68
Atomic Symbol = Er
Mass Number = 166
Relative Atomic Mass = 165.9302931(27)
Isotopic Composition = 0.33503(36)
Standard Atomic Weight = 167.259(3)

Atomic Number = 68
Atomic Symbol = Er
Mass Number = 167
Relative Atomic Mass = 166.9320482(27)
Isotopic Composition = 0.22869(9)
Standard Atomic Weight = 167.259(3)

Atomic Number = 68
Atomic Symbol = Er
Mass Number = 168
Relative Atomic Mass = 167.9323702(27)
Isotopic Composition = 0.26978(18)
Standard Atomic Weight = 167.259(3)

Atomic Number = 68
Atomic Symbol = Er
Mass Number = 170
Relative Atomic Mass = 169.9354643(30)
Isotopic Composition = 0.14910(36)
Standard Atomic Weight = 167.259(3)

Atomic Number = 69
Atomic Symbol = Tm
Mass Number = 169
Relative Atomic Mass = 168.9342133(27)
Isotopic Composition = 1.0000
Standard Atomic Weight = 168.93421(2)

Atomic Number = 70
Atomic Symbol = Yb
Mass Number = 168
Relative Atomic Mass = 167.933897(5)
Isotopic Composition = 0.0013(1)
Standard Atomic Weight = 173.054(5)

Atomic Number = 70
Atomic Symbol = Yb
Mass Number = 170
Relative Atomic Mass = 169.9347618(26)
Isotopic Composition = 0.0304(15)
Standard Atomic Weight = 173.054(5)

Atomic Number = 70
Atomic Symbol = Yb
Mass Number = 171
Relative Atomic Mass = 170.9363258(26)
Isotopic Composition = 0.1428(57)
Standard Atomic Weight = 173.054(5)

Atomic Number = 70
Atomic Symbol = Yb
Mass Number = 172
Relative Atomic Mass = 171.9363815(26)
Isotopic Composition = 0.2183(67)
Standard Atomic Weight = 173.054(5)

Atomic Number = 70
Atomic Symbol = Yb
Mass Number = 173
Relative Atomic Mass = 172.9382108(26)
Isotopic Composition = 0.1613(27)
Standard Atomic Weight = 173.054(5)

Atomic Number = 70
Atomic Symbol = Yb
Mass Number = 174
Relative Atomic Mass = 173.9388621(26)
Isotopic Composition = 0.3183(92)
Standard Atomic Weight = 173.054(5)

Atomic Number = 70
Atomic Symbol = Yb
Mass Number = 176
Relative Atomic Mass = 175.9425717(28)
Isotopic Composition = 0.1276(41)
Standard Atomic Weight = 173.054(5)

Atomic Number = 71
Atomic Symbol = Lu
Mass Number = 175
Relative Atomic Mass = 174.9407718(23)
Isotopic Composition = 0.9741(2)
Standard Atomic Weight = 174.9668(1)

Atomic Number = 71
Atomic Symbol = Lu
Mass Number = 176
Relative Atomic Mass = 175.9426863(23)
Isotopic Composition = 0.0259(2)
Standard Atomic Weight = 174.9668(1)

Atomic Number = 72
Atomic Symbol = Hf
Mass Number = 174
Relative Atomic Mass = 173.940046(3)
Isotopic Composition = 0.0016(1)
Standard Atomic Weight = 178.49(2)

Atomic Number = 72
Atomic Symbol = Hf
Mass Number = 176
Relative Atomic Mass = 175.9414086(24)
Isotopic Composition = 0.0526(7)
Standard Atomic Weight = 178.49(2)

Atomic Number = 72
Atomic Symbol = Hf
Mass Number = 177
Relative Atomic Mass = 176.9432207(23)
Isotopic Composition = 0.1860(9)
Standard Atomic Weight = 178.49(2)

Atomic Number = 72
Atomic Symbol = Hf
Mass Number = 178
Relative Atomic Mass = 177.9436988(23)
Isotopic Composition = 0.2728(7)
Standard Atomic Weight = 178.49(2)

Atomic Number = 72
Atomic Symbol = Hf
Mass Number = 179
Relative Atomic Mass = 178.9458161(23)
Isotopic Composition = 0.1362(2)
Standard Atomic Weight = 178.49(2)

Atomic Number = 72
Atomic Symbol = Hf
Mass Number = 180
Relative Atomic Mass = 179.9465500(23)
Isotopic Composition = 0.3508(16)
Standard Atomic Weight = 178.49(2)

Atomic Number = 73
Atomic Symbol = Ta
Mass Number = 180
Relative Atomic Mass = 179.9474648(24)
Isotopic Composition = 0.00012(2)
Standard Atomic Weight = 180.94788(2)

Atomic Number = 73
Atomic Symbol = Ta
Mass Number = 181
Relative Atomic Mass = 180.9479958(19)
Isotopic Composition = 0.99988(2)
Standard Atomic Weight = 180.94788(2)

Atomic Number = 74
Atomic Symbol = W
Mass Number = 180
Relative Atomic Mass = 179.946704(4)
Isotopic Composition = 0.0012(1)
Standard Atomic Weight = 183.84(1)

Atomic Number = 74
Atomic Symbol = W
Mass Number = 182
Relative Atomic Mass = 181.9482042(9)
Isotopic Composition = 0.2650(16)
Standard Atomic Weight = 183.84(1)

Atomic Number = 74
Atomic Symbol = W
Mass Number = 183
Relative Atomic Mass = 182.9502230(9)
Isotopic Composition = 0.1431(4)
Standard Atomic Weight = 183.84(1)

Atomic Number = 74
Atomic Symbol = W
Mass Number = 184
Relative Atomic Mass = 183.9509312(9)
Isotopic Composition = 0.3064(2)
Standard Atomic Weight = 183.84(1)

Atomic Number = 74
Atomic Symbol = W
Mass Number = 186
Relative Atomic Mass = 185.9543641(19)
Isotopic Composition = 0.2843(19)
Standard Atomic Weight = 183.84(1)

Atomic Number = 75
Atomic Symbol = Re
Mass Number = 185
Relative Atomic Mass = 184.9529550(13)
Isotopic Composition = 0.3740(2)
Standard Atomic Weight = 186.207(1)

Atomic Number = 75
Atomic Symbol = Re
Mass Number = 187
Relative Atomic Mass = 186.9557531(15)
Isotopic Composition = 0.6260(2)
Standard Atomic Weight = 186.207(1)

Atomic Number = 76
Atomic Symbol = Os
Mass Number = 184
Relative Atomic Mass = 183.9524891(14)
Isotopic Composition = 0.0002(1)
Standard Atomic Weight = 190.23(3)

Atomic Number = 76
Atomic Symbol = Os
Mass Number = 186
Relative Atomic Mass = 185.9538382(15)
Isotopic Composition = 0.0159(3)
Standard Atomic Weight = 190.23(3)

Atomic Number = 76
Atomic Symbol = Os
Mass Number = 187
Relative Atomic Mass = 186.9557505(15)
Isotopic Composition = 0.0196(2)
Standard Atomic Weight = 190.23(3)

Atomic Number = 76
Atomic Symbol = Os
Mass Number = 188
Relative Atomic Mass = 187.9558382(15)
Isotopic Composition = 0.1324(8)
Standard Atomic Weight = 190.23(3)

Atomic Number = 76
Atomic Symbol = Os
Mass Number = 189
Relative Atomic Mass = 188.9581475(16)
Isotopic Composition = 0.1615(5)
Standard Atomic Weight = 190.23(3)

Atomic Number = 76
Atomic Symbol = Os
Mass Number = 190
Relative Atomic Mass = 189.9584470(16)
Isotopic Composition = 0.2626(2)
Standard Atomic Weight = 190.23(3)

Atomic Number = 76
Atomic Symbol = Os
Mass Number = 192
Relative Atomic Mass = 191.9614807(27)
Isotopic Composition = 0.4078(19)
Standard Atomic Weight = 190.23(3)

Atomic Number = 77
Atomic Symbol = Ir
Mass Number = 191
Relative Atomic Mass = 190.9605940(18)
Isotopic Composition = 0.373(2)
Standard Atomic Weight = 192.217(3)

Atomic Number = 77
Atomic Symbol = Ir
Mass Number = 193
Relative Atomic Mass = 192.9629264(18)
Isotopic Composition = 0.627(2)
Standard Atomic Weight = 192.217(3)

Atomic Number = 78
Atomic Symbol = Pt
Mass Number = 190
Relative Atomic Mass = 189.959932(6)
Isotopic Composition = 0.00014(1)
Standard Atomic Weight = 195.084(9)

Atomic Number = 78
Atomic Symbol = Pt
Mass Number = 192
Relative Atomic Mass = 191.9610380(27)
Isotopic Composition = 0.00782(7)
Standard Atomic Weight = 195.084(9)

Atomic Number = 78
Atomic Symbol = Pt
Mass Number = 194
Relative Atomic Mass = 193.9626803(9)
Isotopic Composition = 0.32967(99)
Standard Atomic Weight = 195.084(9)

Atomic Number = 78
Atomic Symbol = Pt
Mass Number = 195
Relative Atomic Mass = 194.9647911(9)
Isotopic Composition = 0.33832(10)
Standard Atomic Weight = 195.084(9)

Atomic Number = 78
Atomic Symbol = Pt
Mass Number = 196
Relative Atomic Mass = 195.9649515(9)
Isotopic Composition = 0.25242(41)
Standard Atomic Weight = 195.084(9)

Atomic Number = 78
Atomic Symbol = Pt
Mass Number = 198
Relative Atomic Mass = 197.967893(3)
Isotopic Composition = 0.07163(55)
Standard Atomic Weight = 195.084(9)

Atomic Number = 79
Atomic Symbol = Au
Mass Number = 197
Relative Atomic Mass = 196.9665687(6)
Isotopic Composition = 1.0000
Standard Atomic Weight = 196.966569(4)

Atomic Number = 80
Atomic Symbol = Hg
Mass Number = 196
Relative Atomic Mass = 195.965833(3)
Isotopic Composition = 0.0015(1)
Standard Atomic Weight = 200.59(2)

Atomic Number = 80
Atomic Symbol = Hg
Mass Number = 198
Relative Atomic Mass = 197.9667690(4)
Isotopic Composition = 0.0997(20)
Standard Atomic Weight = 200.59(2)

Atomic Number = 80
Atomic Symbol = Hg
Mass Number = 199
Relative Atomic Mass = 198.9682799(4)
Isotopic Composition = 0.1687(22)
Standard Atomic Weight = 200.59(2)

Atomic Number = 80
Atomic Symbol = Hg
Mass Number = 200
Relative Atomic Mass = 199.9683260(4)
Isotopic Composition = 0.2310(19)
Standard Atomic Weight = 200.59(2)

Atomic Number = 80
Atomic Symbol = Hg
Mass Number = 201
Relative Atomic Mass = 200.9703023(6)
Isotopic Composition = 0.1318(9)
Standard Atomic Weight = 200.59(2)

Atomic Number = 80
Atomic Symbol = Hg
Mass Number = 202
Relative Atomic Mass = 201.9706430(6)
Isotopic Composition = 0.2986(26)
Standard Atomic Weight = 200.59(2)

Atomic Number = 80
Atomic Symbol = Hg
Mass Number = 204
Relative Atomic Mass = 203.9734939(4)
Isotopic Composition = 0.0687(15)
Standard Atomic Weight = 200.59(2)

Atomic Number = 81
Atomic Symbol = Tl
Mass Number = 203
Relative Atomic Mass = 202.9723442(14)
Isotopic Composition = 0.2952(1)
Standard Atomic Weight = 204.3833(2)

Atomic Number = 81
Atomic Symbol = Tl
Mass Number = 205
Relative Atomic Mass = 204.9744275(14)
Isotopic Composition = 0.7048(1)
Standard Atomic Weight = 204.3833(2)

Atomic Number = 82
Atomic Symbol = Pb
Mass Number = 204
Relative Atomic Mass = 203.9730436(13)
Isotopic Composition = 0.014(1)
Standard Atomic Weight = 207.2(1)

Atomic Number = 82
Atomic Symbol = Pb
Mass Number = 206
Relative Atomic Mass = 205.9744653(13)
Isotopic Composition = 0.241(1)
Standard Atomic Weight = 207.2(1)

Atomic Number = 82
Atomic Symbol = Pb
Mass Number = 207
Relative Atomic Mass = 206.9758969(13)
Isotopic Composition = 0.221(1)
Standard Atomic Weight = 207.2(1)

Atomic Number = 82
Atomic Symbol = Pb
Mass Number = 208
Relative Atomic Mass = 207.9766521(13)
Isotopic Composition = 0.524(1)
Standard Atomic Weight = 207.2(1)

Atomic Number = 83
Atomic Symbol = Bi
Mass Number = 209
Relative Atomic Mass = 208.9803987(16)
Isotopic Composition = 1.0000
Standard Atomic Weight = 208.98040(1)

Atomic Number = 84
Atomic Symbol = Po
Mass Number = 209
Relative Atomic Mass = 208.9824304(20)
Isotopic Composition = 
Standard Atomic Weight = [209]

Atomic Number = 84
Atomic Symbol = Po
Mass Number = 210
Relative Atomic Mass = 209.9828737(13)
Isotopic Composition = 
Standard Atomic Weight = [209]

Atomic Number = 85
Atomic Symbol = At
Mass Number = 210
Relative Atomic Mass = 209.987148(8)
Isotopic Composition = 
Standard Atomic Weight = [210]

Atomic Number = 85
Atomic Symbol = At
Mass Number = 211
Relative Atomic Mass = 210.9874963(30)
Isotopic Composition = 
Standard Atomic Weight = [210]

Atomic Number = 86
Atomic Symbol = Rn
Mass Number = 211
Relative Atomic Mass = 210.990601(7)
Isotopic Composition = 
Standard Atomic Weight = [222]

Atomic Number = 86
Atomic Symbol = Rn
Mass Number = 220
Relative Atomic Mass = 220.0113940(24)
Isotopic Composition = 
Standard Atomic Weight = [222]

Atomic Number = 86
Atomic Symbol = Rn
Mass Number = 222
Relative Atomic Mass = 222.0175777(25)
Isotopic Composition = 
Standard Atomic Weight = [222]

Atomic Number = 87
Atomic Symbol = Fr
Mass Number = 223
Relative Atomic Mass = 223.0197359(26)
Isotopic Composition = 
Standard Atomic Weight = [223]

Atomic Number = 88
Atomic Symbol = Ra
Mass Number = 223
Relative Atomic Mass = 223.0185022(27)
Isotopic Composition = 
Standard Atomic Weight = [226]

Atomic Number = 88
Atomic Symbol = Ra
Mass Number = 224
Relative Atomic Mass = 224.0202118(24)
Isotopic Composition = 
Standard Atomic Weight = [226]

Atomic Number = 88
Atomic Symbol = Ra
Mass Number = 226
Relative Atomic Mass = 226.0254098(25)
Isotopic Composition = 
Standard Atomic Weight = [226]

Atomic Number = 88
Atomic Symbol = Ra
Mass Number = 228
Relative Atomic Mass = 228.0310703(26)
Isotopic Composition = 
Standard Atomic Weight = [226]

Atomic Number = 89
Atomic Symbol = Ac
Mass Number = 227
Relative Atomic Mass = 227.0277521(26)
Isotopic Composition = 
Standard Atomic Weight = [227]

Atomic Number = 90
Atomic Symbol = Th
Mass Number = 230
Relative Atomic Mass = 230.0331338(19)
Isotopic Composition = 
Standard Atomic Weight = 232.03806(2)

Atomic Number = 90
Atomic Symbol = Th
Mass Number = 232
Relative Atomic Mass = 232.0380553(21)
Isotopic Composition = 1.0000
Standard Atomic Weight = 232.03806(2)

Atomic Number = 91
Atomic Symbol = Pa
Mass Number = 231
Relative Atomic Mass = 231.0358840(24)
Isotopic Composition = 1.0000
Standard Atomic Weight = 231.03588(2)

Atomic Number = 92
Atomic Symbol = U
Mass Number = 233
Relative Atomic Mass = 233.0396352(29)
Isotopic Composition = 
Standard Atomic Weight = 238.02891(3)

Atomic Number = 92
Atomic Symbol = U
Mass Number = 234
Relative Atomic Mass = 234.0409521(20)
Isotopic Composition = 0.000054(5)
Standard Atomic Weight = 238.02891(3)

Atomic Number = 92
Atomic Symbol = U
Mass Number = 235
Relative Atomic Mass = 235.0439299(20)
Isotopic Composition = 0.007204(6)
Standard Atomic Weight = 238.02891(3)

Atomic Number = 92
Atomic Symbol = U
Mass Number = 236
Relative Atomic Mass = 236.0455680(20)
Isotopic Composition = 
Standard Atomic Weight = 238.02891(3)

Atomic Number = 92
Atomic Symbol = U
Mass Number = 238
Relative Atomic Mass = 238.0507882(20)
Isotopic Composition = 0.992742(10)
Standard Atomic Weight = 238.02891(3)

Atomic Number = 93
Atomic Symbol = Np
Mass Number = 236
Relative Atomic Mass = 236.046570(50)
Isotopic Composition = 
Standard Atomic Weight = [237]

Atomic Number = 93
Atomic Symbol = Np
Mass Number = 237
Relative Atomic Mass = 237.0481734(20)
Isotopic Composition = 
Standard Atomic Weight = [237]

Atomic Number = 94
Atomic Symbol = Pu
Mass Number = 238
Relative Atomic Mass = 238.0495599(20)
Isotopic Composition = 
Standard Atomic Weight = [244]

Atomic Number = 94
Atomic Symbol = Pu
Mass Number = 239
Relative Atomic Mass = 239.0521634(20)
Isotopic Composition = 
Standard Atomic Weight = [244]

Atomic Number = 94
Atomic Symbol = Pu
Mass Number = 240
Relative Atomic Mass = 240.0538135(20)
Isotopic Composition = 
Standard Atomic Weight = [244]

Atomic Number = 94
Atomic Symbol = Pu
Mass Number = 241
Relative Atomic Mass = 241.0568515(20)
Isotopic Composition = 
Standard Atomic Weight = [244]

Atomic Number = 94
Atomic Symbol = Pu
Mass Number = 242
Relative Atomic Mass = 242.0587426(20)
Isotopic Composition = 
Standard Atomic Weight = [244]

Atomic Number = 94
Atomic Symbol = Pu
Mass Number = 244
Relative Atomic Mass = 244.064204(5)
Isotopic Composition = 
Standard Atomic Weight = [244]

Atomic Number = 95
Atomic Symbol = Am
Mass Number = 241
Relative Atomic Mass = 241.0568291(20)
Isotopic Composition = 
Standard Atomic Weight = [243]

Atomic Number = 95
Atomic Symbol = Am
Mass Number = 243
Relative Atomic Mass = 243.0613811(25)
Isotopic Composition = 
Standard Atomic Weight = [243]

Atomic Number = 96
Atomic Symbol = Cm
Mass Number = 243
Relative Atomic Mass = 243.0613891(22)
Isotopic Composition = 
Standard Atomic Weight = [247]

Atomic Number = 96
Atomic Symbol = Cm
Mass Number = 244
Relative Atomic Mass = 244.0627526(20)
Isotopic Composition = 
Standard Atomic Weight = [247]

Atomic Number = 96
Atomic Symbol = Cm
Mass Number = 245
Relative Atomic Mass = 245.0654912(22)
Isotopic Composition = 
Standard Atomic Weight = [247]

Atomic Number = 96
Atomic Symbol = Cm
Mass Number = 246
Relative Atomic Mass = 246.0672237(22)
Isotopic Composition = 
Standard Atomic Weight = [247]

Atomic Number = 96
Atomic Symbol = Cm
Mass Number = 247
Relative Atomic Mass = 247.070354(5)
Isotopic Composition = 
Standard Atomic Weight = [247]

Atomic Number = 96
Atomic Symbol = Cm
Mass Number = 248
Relative Atomic Mass = 248.072349(5)
Isotopic Composition = 
Standard Atomic Weight = [247]

Atomic Number = 97
Atomic Symbol = Bk
Mass Number = 247
Relative Atomic Mass = 247.070307(6)
Isotopic Composition = 
Standard Atomic Weight = [247]

Atomic Number = 97
Atomic Symbol = Bk
Mass Number = 249
Relative Atomic Mass = 249.0749867(28)
Isotopic Composition = 
Standard Atomic Weight = [247]

Atomic Number = 98
Atomic Symbol = Cf
Mass Number = 249
Relative Atomic Mass = 249.0748535(24)
Isotopic Composition = 
Standard Atomic Weight = [251]

Atomic Number = 98
Atomic Symbol = Cf
Mass Number = 250
Relative Atomic Mass = 250.0764061(22)
Isotopic Composition = 
Standard Atomic Weight = [251]

Atomic Number = 98
Atomic Symbol = Cf
Mass Number = 251
Relative Atomic Mass = 251.079587(5)
Isotopic Composition = 
Standard Atomic Weight = [251]

Atomic Number = 98
Atomic Symbol = Cf
Mass Number = 252
Relative Atomic Mass = 252.081626(5)
Isotopic Composition = 
Standard Atomic Weight = [251]

Atomic Number = 99
Atomic Symbol = Es
Mass Number = 252
Relative Atomic Mass = 252.082980(50)
Isotopic Composition = 
Standard Atomic Weight = [252]

Atomic Number = 100
Atomic Symbol = Fm
Mass Number = 257
Relative Atomic Mass = 257.095105(7)
Isotopic Composition = 
Standard Atomic Weight = [257]

Atomic Number = 101
Atomic Symbol = Md
Mass Number = 258
Relative Atomic Mass = 258.098431(5)
Isotopic Composition = 
Standard Atomic Weight = [258]

Atomic Number = 101
Atomic Symbol = Md
Mass Number = 260
Relative Atomic Mass = 260.10365(34)#
Isotopic Composition = 
Standard Atomic Weight = [258]

Atomic Number = 102
Atomic Symbol = No
Mass Number = 259
Relative Atomic Mass = 259.10103(11)#
Isotopic Composition = 
Standard Atomic Weight = [259]

Atomic Number = 103
Atomic Symbol = Lr
Mass Number = 262
Relative Atomic Mass = 262.10963(22)#
Isotopic Composition = 
Standard Atomic Weight = [262]

Atomic Number = 104
Atomic Symbol = Rf
Mass Number = 265
Relative Atomic Mass = 265.11670(46)#
Isotopic Composition = 
Standard Atomic Weight = [265]

Atomic Number = 105
Atomic Symbol = Db
Mass Number = 268
Relative Atomic Mass = 268.12545(57)#
Isotopic Composition = 
Standard Atomic Weight = [268]

Atomic Number = 106
Atomic Symbol = Sg
Mass Number = 271
Relative Atomic Mass = 271.13347(70)#
Isotopic Composition = 
Standard Atomic Weight = [271]

Atomic Number = 107
Atomic Symbol = Bh
Mass Number = 272
Relative Atomic Mass = 272.13803(65)#
Isotopic Composition = 
Standard Atomic Weight = [272]

Atomic Number = 108
Atomic Symbol = Hs
Mass Number = 270
Relative Atomic Mass = 270.13465(31)#
Isotopic Composition = 
Standard Atomic Weight = [270]

Atomic Number = 109
Atomic Symbol = Mt
Mass Number = 276
Relative Atomic Mass = 276.15116(73)#
Isotopic Composition = 
Standard Atomic Weight = [276]

Atomic Number = 110
Atomic Symbol = Ds
Mass Number = 281
Relative Atomic Mass = 281.16206(78)#
Isotopic Composition = 
Standard Atomic Weight = [281]

Atomic Number = 111
Atomic Symbol = Rg
Mass Number = 280
Relative Atomic Mass = 280.16447(80)#
Isotopic Composition = 
Standard Atomic Weight = [280]

Atomic Number = 112
Atomic Symbol = Cn
Mass Number = 285
Relative Atomic Mass = 285.17411(78)#
Isotopic Composition = 
Standard Atomic Weight = [285]

Atomic Number = 113
Atomic Symbol = Uut
Mass Number = 284
Relative Atomic Mass = 284.17808(86)#
Isotopic Composition = 
Standard Atomic Weight = [284]

Atomic Number = 114
Atomic Symbol = Uuq
Mass Number = 289
Relative Atomic Mass = 289.18728(79)#
Isotopic Composition = 
Standard Atomic Weight = [289]

Atomic Number = 115
Atomic Symbol = Uup
Mass Number = 288
Relative Atomic Mass = 288.19249(92)#
Isotopic Composition = 
Standard Atomic Weight = [288]

Atomic Number = 116
Atomic Symbol = Uuh
Mass Number = 293
Relative Atomic Mass = 
Isotopic Composition = 
Standard Atomic Weight = [293]

Atomic Number = 117
Atomic Symbol = Uus
Mass Number = 292
Relative Atomic Mass = 292.20755(101)#
Isotopic Composition = 
Standard Atomic Weight = [292]

Atomic Number = 118
Atomic Symbol = Uuo
Mass Number = 294
Relative Atomic Mass = 
Isotopic Composition = 
Standard Atomic Weight = [294]
