Most of the isotope data on this site has been obtained from the National Nuclear Data Center.
Naturally Occurring Isotopes
Nihonium (Ununtrium) has no naturally occurring isotopes.
Known Isotopes
| Mass Number | Half-life | Decay Mode | Branching Percentage |
| 278 | 0.24 milliseconds | Alpha Decay | 100.00% |
| 279 | No Data Available | No Data Available | No Data Available |
| 280 | No Data Available | No Data Available | No Data Available |
| 281 | No Data Available | No Data Available | No Data Available |
| 282 | 0.07 seconds | Alpha Decay | 100.00% |
| 283 | 100 milliseconds | Alpha Decay | 100.00% |
| 284 | 0.48 seconds | Alpha Decay | 100.00% |
| 285 | 5.5 seconds | Alpha Decay | 100.00% |
| Spontaneous Fission | No Data Available | ||
| 286 | 20 seconds | Alpha Decay | 100.00% |
| Spontaneous Fission | No Data Available | ||
| 287 | No Data Available | Alpha Decay (suspected) | No Data Available |
| Spontaneous Fission (suspected) | No Data Available |
This page is maintained by Steve Gagnon.