Z N Name ==================== 1 0 1H 1 1 2H 2 1 3He 2 2 4He 3 3 6Li 3 4 7Li 4 5 9Be 5 5 10B 5 6 11B 6 6 12C 6 7 13C 7 7 14N 7 8 15N 8 8 16O 8 9 17O 8 10 18O 9 10 19F 10 10 20Ne 10 11 21Ne 10 12 22Ne 11 12 23Na 12 12 24Mg 12 13 25Mg 12 14 26Mg 13 14 27Al 14 14 28Si 14 15 29Si 14 16 30Si 15 16 31P 16 16 32S 16 17 33S 16 18 34S 17 18 35Cl 16 20 36S 18 18 36Ar 17 20 37Cl 18 20 38Ar 19 20 39K 18 22 40Ar 20 20 40Ca 19 22 41K 20 22 42Ca 20 23 43Ca 20 24 44Ca 21 24 45Sc 20 26 46Ca 22 24 46Ti 22 25 47Ti 22 26 48Ti 22 27 49Ti 22 28 50Ti 23 28 51V 24 28 52Cr 24 29 53Cr 24 30 54Cr 26 28 54Fe 25 30 55Mn 26 30 56Fe 26 31 57Fe 26 32 58Fe 28 30 58Ni 27 32 59Co 28 32 60Ni 28 33 61Ni 28 34 62Ni 29 34 63Cu 28 36 64Ni 30 34 64Zn 29 36 65Cu 30 36 66Zn 30 37 67Zn 30 38 68Zn 31 38 69Ga 32 38 70Ge 31 40 71Ga 32 40 72Ge 32 41 73Ge 32 42 74Ge 34 40 74Se 33 42 75As 32 44 76Ge 34 42 76Se 34 43 77Se 34 44 78Se 36 42 78Kr 35 44 79Br 34 46 80Se 36 44 80Kr 35 46 81Br 36 46 82Kr 36 47 83Kr 36 48 84Kr 38 46 84Sr 37 48 85Rb 36 50 86Kr 38 48 86Sr 38 49 87Sr 38 50 88Sr 39 50 89Y 40 50 90Zr 40 51 91Zr 40 52 92Zr 42 50 92Mo 41 52 93Nb 40 54 94Zr 42 52 94Mo 42 53 95Mo 42 54 96Mo 44 52 96Ru 42 55 97Mo 42 56 98Mo 44 54 98Ru 44 55 99Ru 44 56 100Ru 44 57 101Ru 44 58 102Ru 46 56 102Pd 45 58 103Rh 44 60 104Ru 46 58 104Pd 46 59 105Pd 46 60 106Pd 48 58 106Cd 47 60 107Ag 46 62 108Pd 48 60 108Cd 47 62 109Ag 46 64 110Pd 48 62 110Cd 48 63 111Cd 48 64 112Cd 50 62 112Sn 49 64 113In 48 66 114Cd 50 64 114Sn 50 65 115Sn 48 68 116Cd 50 66 116Sn 50 67 117Sn 50 68 118Sn 50 69 119Sn 50 70 120Sn 52 68 120Te 51 70 121Sb 50 72 122Sn 52 70 122Te 51 72 123Sb 50 74 124Sn 52 72 124Te 52 73 125Te 52 74 126Te 54 72 126Xe 53 74 127I 52 76 128Te 54 74 128Xe 54 75 129Xe 54 76 130Xe 56 74 130Ba 54 77 131Xe 54 78 132Xe 56 76 132Ba 55 78 133Cs 54 80 134Xe 56 78 134Ba 56 79 135Ba 56 80 136Ba 58 78 136Ce 56 81 137Ba 56 82 138Ba 58 80 138Ce 57 82 139La 58 82 140Ce 59 82 141Pr 60 82 142Nd 60 83 143Nd 62 82 144Sm 60 85 145Nd 60 86 146Nd 60 88 148Nd 62 88 150Sm 63 88 151Eu 62 90 152Sm 63 90 153Eu 62 92 154Sm 64 90 154Gd 64 91 155Gd 64 92 156Gd 66 90 156Dy 64 93 157Gd 64 94 158Gd 66 92 158Dy 65 94 159Tb 64 96 160Gd 66 94 160Dy 66 95 161Dy 66 96 162Dy 68 94 162Er 66 97 163Dy 66 98 164Dy 68 96 164Er 67 98 165Ho 68 98 166Er 68 99 167Er 68 100 168Er 70 98 168Yb 69 100 169Tm 68 102 170Er 70 100 170Yb 70 101 171Yb 70 102 172Yb 70 103 173Yb 70 104 174Yb 71 104 175Lu 70 106 176Yb 72 104 176Hf 72 105 177Hf 72 106 178Hf 72 107 179Hf 72 108 180Hf 74 106 180W 73 108 181Ta 74 108 182W 75 110 185Re 74 112 186W 76 111 187Os 76 112 188Os 76 113 189Os 76 114 190Os 77 114 191Ir 76 116 192Os 78 114 192Pt 77 116 193Ir 78 116 194Pt 78 117 195Pt 78 118 196Pt 80 116 196Hg 79 118 197Au 78 120 198Pt 80 118 198Hg 80 119 199Hg 80 120 200Hg 80 121 201Hg 80 122 202Hg 81 122 203Tl 80 124 204Hg 81 124 205Tl 82 124 206Pb 82 125 207Pb 82 126 208Pb 83 126 209Bi