in choosing which isotopes to search.
| Isotope | Relative Atomic Mass |
Isotopic Composition |
Standard Atomic Weight |
Notes | ||||
|---|---|---|---|---|---|---|---|---|
 | ||||||||
| 7 | N | 14 | 14.003 074 004 8(6) | 0.996 36(20) | 14.0067(2) | g,r,a,d | ||
| 15 | 15.000 108 898 2(7) | 0.003 64(20) | ||||||
| 14 | Si | 28 | 27.976 926 5325(19) | 0.922 23(19) | 28.0855(3) | r | ||
| 29 | 28.976 494 700(22) | 0.046 85(8) | ||||||
| 30 | 29.973 770 17(3) | 0.030 92(11) | ||||||
| ||||||||
