It's Elemental
Isotopes of the Element Uranium
Uranium
Most of the isotope data on this site has been obtained from the National Nuclear Data Center. Please visit their site for more information.
Isotopes With A Known Natural Abundance
| Mass Number | Natural Abundance | Half-life |
| 234 | 0.0054% | 2.455×10+5 years |
| 235 | 0.7204% | 7.04×10+8 years |
| 238 | 99.2742% | 4.468×109 years |
Known Isotopes
| Mass Number | Half-life | Decay Mode | Branching Percentage |
| 217 | 16 milliseconds | Alpha Decay | <= 100.00% |
| 218 | 0.51 milliseconds | Alpha Decay | 100.00% |
| 218m | 0.56 milliseconds | Alpha Decay | 100.00% |
| 219 | 42 microseconds | Alpha Decay | 100.00% |
| 220 | No Data Available | Alpha Decay (suspected) | No Data Available |
| Electron Capture (suspected) | No Data Available | ||
| 221 | 700 nanoseconds | No Data Available | No Data Available |
| 222 | 1.0 microseconds | Alpha Decay | 100.00% |
| 223 | 18 microseconds | Alpha Decay | 100.00% |
| Electron Capture | 0.20% | ||
| 224 | 0.9 milliseconds | Alpha Decay | 100.00% |
| 225 | 95 milliseconds | Alpha Decay | 100.00% |
| 226 | 0.35 seconds | Alpha Decay | 100.00% |
| 227 | 1.1 minutes | Alpha Decay | 100.00% |
| 228 | 9.1 minutes | Alpha Decay | > 95.00% |
| Electron Capture | < 5.00% | ||
| 229 | 58 minutes | Electron Capture | ~ 80.00% |
| Alpha Decay | ~ 20.00% | ||
| 230 | 20.8 days | Alpha Decay | 100.00% |
| Spontaneous Fission | < 1×10-10 % | ||
| Emission of a neon-22 nucleus | 5×10-12 % | ||
| 231 | 4.2 days | Electron Capture | 100.00% |
| Alpha Decay | ~ 4.0×10-3 % | ||
| 232 | 68.9 years | Alpha Decay | 100.00% |
| Spontaneous Fission | 3×10-12 % | ||
| 233 | 1.592×10+5 years | Alpha Decay | 100.00% |
| Emission of a neon-24 nucleus | 9×10-10 % | ||
| Spontaneous Fission | < 6×10-11 % | ||
| Emission of a magnesium-28 nucleus | < 1×10-13 % | ||
| 234 | 2.455×10+5 years | Emission of a magnesium nucleus | 1×10-11 % |
| Emission of a neon nucleus | 9×10-12 % | ||
| Alpha Decay | 100.00% | ||
| Spontaneous Fission | 1.6×10-9 % | ||
| 235 | 7.04×10+8 years | Alpha Decay | 100.00% |
| Spontaneous Fission | 7.0×10-9 % | ||
| Emission of a magnesium-28 nucleus | 8×10-10 % | ||
| Emission of a neon nucleus | ~ 8×10-10 % | ||
| 235m | ≈ 26 minutes | Isomeric Transition | 100.00% |
| 236 | 2.342×107 years | Alpha Decay | 100.00% |
| Spontaneous Fission | 9.4×10-8 % | ||
| 237 | 6.75 days | Beta-minus Decay | 100.00% |
| 238 | 4.468×109 years | Spontaneous Fission | 5.5×10-5 % |
| Alpha Decay | 100.00% | ||
| 239 | 23.45 minutes | Beta-minus Decay | 100.00% |
| 240 | 14.1 hours | Beta-minus Decay | 100.00% |
| 241 | No Data Available | Beta-minus Decay (suspected) | No Data Available |
| 242 | 16.8 minutes | Beta-minus Decay | 100.00% |
| 243 | No Data Available | No Data Available | No Data Available |
Citation and linking information
For questions about this page, please contact Carol McKisson.