| 同位素 | 丰度 | MO+ | MOH+ |
| 196Hg | 0.15 | 180W16O+ | / |
| 198Hg | 9.97 | 182W16O+ | 182W16OH+ |
| 199Hg | 16.87 | 183W16O+ | 183W16OH+ |
| 200Hg | 23.1 | 184W16O+ | 184W16OH+ |
| 201Hg | 13.18 | / | 185W16OH+ |
| 202Hg | 29.86 | 186W16O+ | / |
| 204Hg | 6.87 | / | / |