Stable isotopes of some light elements

Element Z N A Abundance (%) Symbol
Hydrogen 1 0 1 99.985 1H
1 1 2 0.0155 2H; D
Carbon 6 6 12 98.892 12C
6 7 13 1.108 13C
Nitrogen 7 7 14 99.635 14N
7 8 15 0.365 15N
Oxygen 8 8 16 99.759 16O
8 9 17 0.037 17O
8 10 18 0.204 18O
Sulphur 16 16 32 95 32S
16 17 33 0.75 33S
16 18 34 4.21 34S
16 20 36 0.02 36S
Chlorine 17 18 35 ~75.7 35Cl
17 20 37 ~24.3 37Cl