Science Education
Most of the isotope data on this site has been obtained from the National Nuclear Data Center. Please visit their site for more information.
Naturally Occurring Isotopes
Ununseptium has no naturally occurring isotopes.
Known Isotopes
| Mass Number | Half-life | Decay Mode | Branching Percentage |
| 291 | No Data Available | Spontaneous Fission (suspected) | No Data Available |
| Alpha Decay (suspected) | No Data Available | ||
| 292 | No Data Available | Spontaneous Fission (suspected) | No Data Available |
| Alpha Decay (suspected) | No Data Available | ||
| 293 | 14 milliseconds | Alpha Decay | 100.00% |
| Spontaneous Fission | No Data Available | ||
| 294 | 0.08 seconds | Alpha Decay | 100.00% |
This page is maintained by Steve Gagnon.
