in choosing which isotopes to search.
| Isotope | Relative Atomic Mass |
Isotopic Composition |
Standard Atomic Weight |
Notes | ||||
|---|---|---|---|---|---|---|---|---|
 | ||||||||
| 6 | C | 12 | 12.000 000 0(0) | 98.93(8) | 12.0107(8) | g,r | ||
| 13 | 13.003 354 8378(10) | 1.07(8) | ||||||
| 14 | 14.003 241 988(4) | |||||||
| 7 | N | 14 | 14.003 074 005 2(9) | 99.632(7) | 14.0067(2) | g,r,e | ||
| 15 | 15.000 108 898 4(9) | 0.368(7) | ||||||
| 8 | O | 16 | 15.994 914 6221(15) | 99.757(16) | 15.9994(3) | g,r | ||
| 17 | 16.999 131 50(22) | 0.038(1) | ||||||
| 18 | 17.999 160 4(9) | 0.205(14) | ||||||
| ||||||||
