# Natural abundances # Z A El abundance uncert. # [%] [%] #------------------------------- 1 1 H 99.985000 0.001000 1 2 H 0.015000 0.001000 2 3 He 0.000137 0.000003 2 4 He 99.999863 0.000003 3 6 Li 7.590000 0.040000 3 7 Li 92.410000 0.040000 4 9 Be 100.000000 0.000000 5 10 B 19.800000 0.300000 5 11 B 80.200000 0.300000 6 12 C 98.890000 0.010000 6 13 C 1.110000 0.010000 7 14 N 99.634000 0.020000 7 15 N 0.366000 0.020000 8 16 O 99.762000 0.016000 8 17 O 0.038000 0.001000 8 18 O 0.200000 0.014000 9 19 F 100.000000 0.000000 10 20 Ne 90.480000 0.030000 10 21 Ne 0.270000 0.010000 10 22 Ne 9.250000 0.030000 11 23 Na 100.000000 0.000000 12 24 Mg 78.990000 0.040000 12 25 Mg 10.000000 0.010000 12 26 Mg 11.010000 0.030000 13 27 Al 100.000000 0.000000 14 28 Si 92.230000 0.019000 14 29 Si 4.683000 0.008000 14 30 Si 3.087000 0.005000 15 31 P 100.000000 0.000000 16 32 S 95.020000 0.090000 16 33 S 0.750000 0.010000 16 34 S 4.210000 0.080000 16 36 S 0.020000 0.010000 17 35 Cl 75.770000 0.040000 17 37 Cl 24.230000 0.040000 18 36 Ar 0.336500 0.003000 18 38 Ar 0.063200 0.000500 18 40 Ar 99.600300 0.003000 19 39 K 93.258100 0.004400 19 40 K 0.011700 0.000100 19 41 K 6.730200 0.004400 20 40 Ca 96.940000 0.160000 20 42 Ca 0.647000 0.023000 20 43 Ca 0.135000 0.010000 20 44 Ca 2.090000 0.110000 20 46 Ca 0.004000 0.003000 20 48 Ca 0.187000 0.021000 21 45 Sc 100.000000 0.000000 22 46 Ti 8.250000 0.030000 22 47 Ti 7.440000 0.020000 22 48 Ti 73.720000 0.030000 22 49 Ti 5.410000 0.020000 22 50 Ti 5.180000 0.020000 23 50 V 0.250000 0.002000 23 51 V 99.750000 0.002000 24 50 Cr 4.345000 0.013000 24 52 Cr 83.789000 0.018000 24 53 Cr 9.501000 0.017000 24 54 Cr 2.365000 0.007000 25 55 Mn 100.000000 0.000000 26 54 Fe 5.845000 0.035000 26 56 Fe 91.754000 0.036000 26 57 Fe 2.119000 0.010000 26 58 Fe 0.282000 0.004000 27 59 Co 100.000000 0.000000 28 58 Ni 68.077000 0.009000 28 60 Ni 26.223000 0.008000 28 61 Ni 1.140000 0.001000 28 62 Ni 3.634000 0.002000 28 64 Ni 0.926000 0.001000 29 63 Cu 69.170000 0.030000 29 65 Cu 30.830000 0.030000 30 64 Zn 48.630000 0.600000 30 66 Zn 27.900000 0.270000 30 67 Zn 4.100000 0.130000 30 68 Zn 18.750000 0.510000 30 70 Zn 0.620000 0.030000 31 69 Ga 60.108000 0.009000 31 71 Ga 39.892000 0.009000 32 70 Ge 20.370000 0.180000 32 72 Ge 27.310000 0.260000 32 73 Ge 7.760000 0.080000 32 74 Ge 36.730000 0.150000 32 76 Ge 7.830000 0.070000 33 75 As 100.000000 0.000000 34 74 Se 0.890000 0.040000 34 76 Se 9.370000 0.290000 34 77 Se 7.630000 0.160000 34 78 Se 23.770000 0.280000 34 80 Se 49.610000 0.410000 34 82 Se 8.730000 0.220000 35 79 Br 50.690000 0.070000 35 81 Br 49.310000 0.070000 36 78 Kr 0.350000 0.010000 36 80 Kr 2.280000 0.060000 36 82 Kr 11.580000 0.140000 36 83 Kr 11.490000 0.060000 36 84 Kr 57.000000 0.040000 36 86 Kr 17.300000 0.220000 37 85 Rb 72.170000 0.020000 37 87 Rb 27.830000 0.020000 38 84 Sr 0.560000 0.010000 38 86 Sr 9.860000 0.010000 38 87 Sr 7.000000 0.010000 38 88 Sr 82.580000 0.010000 39 89 Y 100.000000 0.000000 40 90 Zr 51.450000 0.400000 40 91 Zr 11.220000 0.050000 40 92 Zr 17.150000 0.080000 40 94 Zr 17.380000 0.280000 40 96 Zr 2.800000 0.090000 41 93 Nb 100.000000 0.000000 42 92 Mo 14.840000 0.350000 42 94 Mo 9.250000 0.120000 42 95 Mo 15.920000 0.130000 42 96 Mo 16.680000 0.020000 42 97 Mo 9.550000 0.080000 42 98 Mo 24.130000 0.310000 42 100 Mo 9.630000 0.230000 44 96 Ru 5.540000 0.140000 44 98 Ru 1.870000 0.030000 44 99 Ru 12.760000 0.140000 44 100 Ru 12.600000 0.070000 44 101 Ru 17.060000 0.020000 44 102 Ru 31.550000 0.140000 44 104 Ru 18.620000 0.270000 45 103 Rh 100.000000 0.000000 46 102 Pd 1.020000 0.010000 46 104 Pd 11.140000 0.080000 46 105 Pd 22.330000 0.080000 46 106 Pd 27.330000 0.030000 46 108 Pd 26.460000 0.090000 46 110 Pd 11.720000 0.090000 47 107 Ag 51.839000 0.008000 47 109 Ag 48.161000 0.008000 48 106 Cd 1.250000 0.060000 48 108 Cd 0.890000 0.030000 48 110 Cd 12.490000 0.180000 48 111 Cd 12.800000 0.120000 48 112 Cd 24.130000 0.210000 48 113 Cd 12.220000 0.120000 48 114 Cd 28.730000 0.420000 48 116 Cd 7.490000 0.180000 49 113 In 4.290000 0.050000 49 115 In 95.710000 0.050000 50 112 Sn 0.970000 0.010000 50 114 Sn 0.660000 0.010000 50 115 Sn 0.340000 0.010000 50 116 Sn 14.540000 0.090000 50 117 Sn 7.680000 0.070000 50 118 Sn 24.220000 0.090000 50 119 Sn 8.590000 0.040000 50 120 Sn 32.580000 0.090000 50 122 Sn 4.630000 0.030000 50 124 Sn 5.790000 0.050000 51 121 Sb 57.210000 0.050000 51 123 Sb 42.790000 0.050000 52 120 Te 0.090000 0.010000 52 122 Te 2.550000 0.120000 52 123 Te 0.890000 0.030000 52 124 Te 4.740000 0.140000 52 125 Te 7.070000 0.150000 52 126 Te 18.840000 0.250000 52 128 Te 31.740000 0.080000 52 130 Te 34.080000 0.620000 53 127 I 100.000000 0.000000 54 124 Xe 0.095000 0.003000 54 126 Xe 0.089000 0.001000 54 128 Xe 1.910000 0.022000 54 129 Xe 26.400000 0.180000 54 130 Xe 4.071000 0.053000 54 131 Xe 21.232000 0.062000 54 132 Xe 26.909000 0.068000 54 134 Xe 10.436000 0.029000 54 136 Xe 8.857000 0.033000 55 133 Cs 100.000000 0.000000 56 130 Ba 0.106000 0.001000 56 132 Ba 0.101000 0.001000 56 134 Ba 2.417000 0.018000 56 135 Ba 6.592000 0.012000 56 136 Ba 7.854000 0.024000 56 137 Ba 11.232000 0.024000 56 138 Ba 71.698000 0.042000 57 138 La 0.090000 0.001000 57 139 La 99.910000 0.001000 58 136 Ce 0.185000 0.002000 58 138 Ce 0.251000 0.002000 58 140 Ce 88.450000 0.018000 58 142 Ce 11.114000 0.017000 59 141 Pr 100.000000 0.000000 60 142 Nd 27.200000 0.500000 60 143 Nd 12.200000 0.200000 60 144 Nd 23.800000 0.300000 60 145 Nd 8.300000 0.100000 60 146 Nd 17.200000 0.300000 60 148 Nd 5.700000 0.100000 60 150 Nd 5.600000 0.200000 62 144 Sm 3.070000 0.070000 62 147 Sm 14.990000 0.180000 62 148 Sm 11.240000 0.100000 62 149 Sm 13.820000 0.070000 62 150 Sm 7.380000 0.010000 62 152 Sm 26.750000 0.160000 62 154 Sm 22.750000 0.290000 63 151 Eu 47.810000 0.030000 63 153 Eu 52.190000 0.030000 64 152 Gd 0.200000 0.010000 64 154 Gd 2.180000 0.030000 64 155 Gd 14.800000 0.120000 64 156 Gd 20.470000 0.090000 64 157 Gd 15.650000 0.020000 64 158 Gd 24.840000 0.070000 64 160 Gd 21.860000 0.190000 65 159 Tb 100.000000 0.000000 66 156 Dy 0.060000 0.010000 66 158 Dy 0.100000 0.010000 66 160 Dy 2.340000 0.080000 66 161 Dy 18.910000 0.240000 66 162 Dy 25.510000 0.260000 66 163 Dy 24.900000 0.160000 66 164 Dy 28.180000 0.370000 67 165 Ho 100.000000 0.000000 68 162 Er 0.139000 0.005000 68 164 Er 1.601000 0.003000 68 166 Er 33.503000 0.036000 68 167 Er 22.869000 0.009000 68 168 Er 26.978000 0.018000 68 170 Er 14.910000 0.036000 69 169 Tm 100.000000 0.000000 70 168 Yb 0.130000 0.010000 70 170 Yb 3.040000 0.150000 70 171 Yb 14.280000 0.570000 70 172 Yb 21.830000 0.670000 70 173 Yb 16.130000 0.270000 70 174 Yb 31.830000 0.920000 70 176 Yb 12.760000 0.410000 71 175 Lu 97.410000 0.020000 71 176 Lu 2.590000 0.020000 72 174 Hf 0.160000 0.010000 72 176 Hf 5.260000 0.070000 72 177 Hf 18.600000 0.090000 72 178 Hf 27.280000 0.070000 72 179 Hf 13.620000 0.020000 72 180 Hf 35.080000 0.160000 73 180 Ta 0.012000 0.002000 73 181 Ta 99.988000 0.002000 74 180 W 0.120000 0.010000 74 182 W 26.500000 0.160000 74 183 W 14.310000 0.040000 74 184 W 30.640000 0.020000 74 186 W 28.430000 0.190000 75 185 Re 37.400000 0.020000 75 187 Re 62.600000 0.020000 76 184 Os 0.020000 0.010000 76 186 Os 1.590000 0.030000 76 187 Os 1.600000 0.300000 76 188 Os 13.290000 0.080000 76 189 Os 16.210000 0.050000 76 190 Os 26.360000 0.020000 76 192 Os 40.930000 0.190000 77 191 Ir 37.300000 0.200000 77 193 Ir 62.700000 0.200000 78 190 Pt 0.014000 0.001000 78 192 Pt 0.782000 0.007000 78 194 Pt 32.967000 0.099000 78 195 Pt 33.832000 0.010000 78 196 Pt 25.242000 0.041000 78 198 Pt 7.163000 0.055000 79 197 Au 100.000000 0.000000 80 196 Hg 0.150000 0.010000 80 198 Hg 9.970000 0.200000 80 199 Hg 16.870000 0.220000 80 200 Hg 23.100000 0.190000 80 201 Hg 13.180000 0.090000 80 202 Hg 29.860000 0.260000 80 204 Hg 6.870000 0.150000 81 203 Tl 29.524000 0.014000 81 205 Tl 70.476000 0.014000 82 204 Pb 1.400000 0.100000 82 206 Pb 24.100000 0.100000 82 207 Pb 22.100000 0.100000 82 208 Pb 52.400000 0.100000 83 209 Bi 100.000000 0.000000 90 232 Th 100.000000 0.000000 92 234 U 0.005400 0.000500 92 235 U 0.720400 0.000600 92 238 U 99.274200 0.001000