in choosing which isotopes to search.
| Isotope | Relative Atomic Mass |
Isotopic Composition |
Standard Atomic Weight |
Notes | ||||
|---|---|---|---|---|---|---|---|---|
 | ||||||||
| 1 | H | 1 | 1.007 825 032 1(4) | 99.9885(70) | 1.007 94(7) | g,m,r,c,w | ||
| D | 2 | 2.014 101 778 0(4) | 0.0115(70) | |||||
| T | 3 | 3.016 049 2675(11) | ||||||
| 34 | Se | 74 | 73.922 4766(16) | 0.89(4) | 78.96(3) | r | ||
| 76 | 75.919 2141(16) | 9.37(29) | ||||||
| 77 | 76.919 9146(16) | 7.63(16) | ||||||
| 78 | 77.917 3095(16) | 23.77(28) | ||||||
| 80 | 79.916 5218(20) | 49.61(41) | ||||||
| 82 | 81.916 7000(22) | 8.73(22) | ||||||
| ||||||||
