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) | ||||||
| 18 | Ar | 36 | 35.967 546 28(27) | 0.3365(30) | 39.948(1) | g,r,a | ||
| 38 | 37.962 732 2(5) | 0.0632(5) | ||||||
| 40 | 39.962 383 123(3) | 99.6003(30) | ||||||
| ||||||||
