APPENDIX C
Atomic and Nuclear Data

Atomic Number (Z) Element Symbol Mass Number (A) Atomic Mass (u) Percent Abundance Decay Mode Half-Life t1/2
0 (Neutron) n 1 1.008 665 β− 10.4 min
1 Hydrogen H 1 1.007 825 99.985 stable
Deuterium D 2 2.014 102 0.015 stable
Tritium T 3 3.016 049 β− 12.33 yr
2 Helium He 3 3.016 029 0.000 1 stable
4 4.002 602 99.999 9 stable
6 6.018 886 β− 0.81 s
3 Lithium Li 6 6.015 121 7.50 stable
7 7.016 003 92.50 stable
8 8.022 486 β− 0.84 s
4 Beryllium Be 7 7.016 928 EC 53.3 days
9 9.012 174 100 stable
10 10.013 534 β− 1.5×106 yr
5 Boron B 10 10.012 936 19.90 stable
11 11.009 305 80.10 stable
12 12.014 352 β− 0.020 2 s
6 Carbon C 10 10.016 854 β+ 19.3 s
11 11.011 433 β+ 20.4 min
12 12.000 000 98.90 stable
13 13.003 355 1.10 stable
14 14.003 242 β− 5 730 yr
15 15.010 599 β− 2.45 s
7 Nitrogen N 12 12.018 613 β+ 0.011 0 s
13 13.005 738 β+ 9.96 min
14 14.003 074 99.63 stable
15 15.000 108 0.37 stable
16 16.006 100 β− 7.13 s
17 17.008 450 β− 4.17 s
8 Oxygen O 14 14.008 595 EC 70.6 s
15 15.003 065 β+ 122 s
16 15.994 915 99.76 stable
17 16.999 132 0.04 stable
18 17.999 160 0.20 stable
19 19.003 577 β− 26.9 s
9 Fluorine F 17 17.002 094 EC 64.5 s
18 18.000 937 β+ 109.8 min
19 18.998 404 100 stable
20 19.999 982 β− 11.0 s
10 Neon Ne 19 19.001 880 β+ 17.2 s
20 19.992 435 90.48 stable
21 20.993 841 0.27 stable
22 21.991 383 9.25 stable
11 Sodium Na 22 21.994 434 β+ 2.61 yr
23 22.989 770 100 stable
24 23.990 961 β− 14.96 h
12 Magnesium Mg 24 23.985 042 78.99 stable
25 24.985 838 10.00 stable
26 25.982 594 11.01 stable
13 Aluminum Al 27 26.981 538 100 stable
28 27.981 910 β− 2.24 min
14 Silicon Si 28 27.976 927 92.23 stable
29 28.976 495 4.67 stable
30 29.973 770 3.10 stable
31 30.975 362 β− 2.62 h
15 Phosphorus P 30 29.978 307 β+ 2.50 min
31 30.973 762 100 stable
32 31.973 908 β− 14.26 days
16 Sulfur S 32 31.972 071 95.02 stable
33 32.971 459 0.75 stable
34 33.967 867 4.21 stable
35 34.969 033 β− 87.5 days
36 35.967 081 0.02 stable
17 Chlorine Cl 35 34.968 853 75.77 stable
36 35.968 307 β− 3.0×105 yr
37 36.965 903 24.23 stable
18 Argon Ar 36 35.967 547 0.34 stable
38 37.962 732 0.06 stable
39 38.964 314 β− 269 yr
40 39.962 384 99.60 stable
42 41.963 049 β− 33 yr
19 Potassium K 39 38.963 708 93.26 stable
40 39.964 000 0.01 β+ 1.28×109 yr
41 40.961 827 6.73 stable
20 Calcium Ca 40 39.962 591 96.94 stable
42 41.958 618 0.64 stable
43 42.958 767 0.13 stable
44 43.955 481 2.08 stable
47 46.954 547 β− 4.5 days
48 47.952 534 0.18 stable
24 Chromium Cr 50 49.946 047 4.34 stable
52 51.940 511 83.79 stable
53 52.940 652 9.50 stable
54 53.938 883 2.36 stable
26 Iron Fe 54 53.939 613 5.9 stable
55 54.938 297 EC 2.7 yr
56 55.934 940 91.72 stable
57 56.935 396 2.1 stable
58 57.933 278 0.28 stable
27 Cobalt Co 59 58.933 198 100 stable
60 59.933 820 β− 5.27 yr
28 Nickel Ni 58 57.935 346 68.08 stable
60 59.930 789 26.22 stable
61 60.931 058 1.14 stable
62 61.928 346 3.63 stable
64 63.927 967 0.92 stable
29 Copper Cu 63 62.929 599 69.17 stable
65 64.927 791 30.83 stable
47 Silver Ag 107 106.905 091 51.84 stable
109 108.904 754 48.16 stable
48 Cadmium Cd 106 105.906 457 1.25 stable
109 108.904 984 EC 462 days
110 109.903 004 12.49 stable
111 110.904 182 12.80 stable
112 111.902 760 24.13 stable
113 112.904 401 12.22 stable
114 113.903 359 28.73 stable
116 115.904 755 7.49 stable
53 Iodine I 127 126.904 474 100 stable
129 128.904 984 β− 1.6×107 yr
131 130.906 124 β− 8 days
54 Xenon Xe 128 127.903 531 1.9 stable
129 128.904 779 26.4 stable
130 129.903 509 4.1 stable
131 130.905 069 21.2 stable
132 131.904 141 26.9 stable
133 132.905 906 β− 5.4 days
134 133.905 394 10.4 stable
136 135.907 215 8.9 stable
55 Cesium Cs 133 132.905 436 100 stable
137 136.907 078 β− 30 yr
56 Barium Ba 131 130.906 931 EC 12 days
133 132.905 990 EC 10.5 yr
134 133.904 492 2.42 stable
135 134.905 671 6.59 stable
136 135.904 559 7.85 stable
137 136.905 816 11.23 stable
138 137.905 236 71.70 stable
79 Gold Au 197 196.966 543 100 stable
81 Thallium Tl 203 202.972 320 29.524 stable
205 204.974 400 70.476 stable
207 206.977 403 β− 4.77 min
82 Lead Pb 204 203.973 020 1.4 stable
205 204.974 457 EC 1.5×107 yr
206 205.974 440 24.1 stable
207 206.975 871 22.1 stable
208 207.976 627 52.4 stable
210 209.984 163 α, β− 22.3 yr
211 210.988 734 β− 36.1 min
83 Bismuth Bi 208 207.979 717 EC 3.7×105 yr
209 208.980 374 100 α 2×1019 yr
211 210.987 254 α 2.14 min
215 215.001 836 β− 7.4 min
84 Polonium Po 209 208.982 405 α 102 yr
210 209.982 848 α 138.38 days
215 214.999 418 α 0.001 8 s
218 218.008 965 α, β− 3.10 min
85 Astatine At 218 218.008 685 α, β− 1.6 s
219 219.011 294 α, β− 0.9 min
86 Radon Rn 219 219.009 477 α 3.96 s
220 220.011 369 α 55.6 s
222 222.017 571 α, β− 3.823 days
87 Francium Fr 223 223.019 733 α, β− 22 min
88 Radium Ra 223 223.018 499 α 11.43 days
224 224.020 187 α 3.66 days
226 226.025 402 α 1 600 yr
228 228.031 064 β− 5.75 yr
89 Actinium Ac 227 227.027 749 α, β− 21.77 yr
228 228.031 015 β− 6.15 h
90 Thorium Th 227 227.027 701 α 18.72 days
228 228.028 716 α 1.913 yr
229 229.031 757 α 7 300 yr
230 230.033 127 α 75 000 yr
231 231.036 299 α, β− 25.52 h
232 232.038 051 100 α 1.40×1010 yr
234 234.043 593 β− 24.1 days
91 Protactinium Pa 231 231.035 880 α 32.760 yr
234 234.043 300 β− 6.7 h
92 Uranium U 233 233.039 630 α 1.59×105 yr
234 234.040 946 α 2.45×105 yr
235 235.043 924 0.72 α 7.04×108 yr
236 236.045 562 α 2.34×107 yr
238 238.050 784 99.28 α 4.47×109 yr
93 Neptunium Np 236 236.046 560 EC 1.15×105 yr
237 237.048 168 α 2.14×106 yr
94 Plutonium Pu 238 238.049 555 α 87.7 yr
239 239.052 157 α 2.412×104 yr
240 240.053 808 α 6 560 yr
242 242.058 737 α 3.73×106 yr