It's Elemental
Isotopes of the Element Bismuth
Bismuth
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 |
| 209 | 100% | 1.9×10+19 years |
Known Isotopes
| Mass Number | Half-life | Decay Mode | Branching Percentage |
| 184 | 13 milliseconds | Alpha Decay | 100.00% |
| Alpha Decay | 100.00% | ||
| 185 | 58 microseconds | Proton Emission | 90.00% |
| Alpha Decay | 10.00% | ||
| 186 | 15.0 milliseconds | Alpha Decay | 100.00% |
| 186m | 9.8 milliseconds | Alpha Decay | 100.00% |
| 187 | 37 milliseconds | Alpha Decay | 100.00% |
| 187m | 0.370 milliseconds | Alpha Decay | 100.00% |
| 188 | 265 milliseconds | Alpha Decay | 100.00% |
| Electron Capture (suspected) | No Data Available | ||
| 188m | 60 milliseconds | Alpha Decay | 100.00% |
| Electron Capture (suspected) | No Data Available | ||
| 189 | 674 milliseconds | Alpha Decay | > 50.00% |
| Electron Capture | < 50.00% | ||
| 189m | 5.0 milliseconds | Alpha Decay | > 50.00% |
| Electron Capture | < 50.00% | ||
| 190 | 6.3 seconds | Alpha Decay | 90.00% |
| Electron Capture | 10.00% | ||
| 190m | 6.2 seconds | Alpha Decay | 70.00% |
| Electron Capture | 30.00% | ||
| 191 | 12.4 seconds | Alpha Decay | 51.00% |
| Electron Capture | 49.00% | ||
| 191m | 125 milliseconds | Alpha Decay | 68.00% |
| Isomeric Transition | 32.00% | ||
| Electron Capture | No Data Available | ||
| 192 | 34.6 seconds | Electron Capture | 88.00% |
| Alpha Decay | 12.00% | ||
| 192m | 39.6 seconds | Electron Capture | 90.00% |
| Alpha Decay | 10.00% | ||
| 193 | 63.6 seconds | Electron Capture | 96.50% |
| Alpha Decay | 3.50% | ||
| 193m | 3.2 seconds | Alpha Decay | 84.00% |
| Electron Capture | 16.00% | ||
| 194 | 95 seconds | Electron Capture | 99.54% |
| Alpha Decay | 0.46% | ||
| 194m | 125 seconds | Electron Capture | 100.00% |
| 194m1 | 115 seconds | Electron Capture | 99.80% |
| Alpha Decay | 0.20% | ||
| 195 | 183 seconds | Electron Capture | 99.97% |
| Alpha Decay | 0.03% | ||
| 195m | 87 seconds | Electron Capture | 67.00% |
| Alpha Decay | 33.00% | ||
| 196 | 308 seconds | Electron Capture | 100.00% |
| Alpha Decay | 1.2×10-3 % | ||
| 196m | 0.6 seconds | Electron Capture | No Data Available |
| Isomeric Transition | No Data Available | ||
| 196m1 | 240 seconds | Electron Capture | 74.20% |
| Isomeric Transition | 25.80% | ||
| Alpha Decay | 3.8×10-4 % | ||
| 197 | 9.33 minutes | Electron Capture | 100.00% |
| Alpha Decay | 1.0×10-4 % | ||
| 197m | 5.04 minutes | Alpha Decay | 55.00% |
| Electron Capture | 45.00% | ||
| Isomeric Transition | < 0.30% | ||
| 198 | 10.3 minutes | Electron Capture | 100.00% |
| 198m | 11.6 minutes | Electron Capture | 100.00% |
| 198m1 | 7.7 seconds | Isomeric Transition | 100.00% |
| 199 | 27 minutes | Electron Capture | 100.00% |
| 199m | 24.70 minutes | Electron Capture | 99.00% |
| Isomeric Transition | <= 2.00% | ||
| Alpha Decay | ~ 0.01% | ||
| 200 | 36.4 minutes | Electron Capture | 100.00% |
| 200m | 31 minutes | Electron Capture | <= 100.00% |
| 200m1 | 0.40 seconds | Isomeric Transition | 100.00% |
| 201 | 103 minutes | Electron Capture | 100.00% |
| 201m | 57.5 minutes | Electron Capture | > 91.10% |
| Isomeric Transition | <= 8.60% | ||
| Alpha Decay | ~ 0.30% | ||
| 202 | 1.71 hours | Electron Capture | 100.00% |
| 203 | 11.76 hours | Electron Capture | 100.00% |
| 203m | 305 milliseconds | Isomeric Transition | 100.00% |
| 204 | 11.22 hours | Electron Capture | 100.00% |
| 204m | 13.0 milliseconds | Isomeric Transition | 100.00% |
| 204m1 | 1.07 milliseconds | Isomeric Transition | 100.00% |
| 205 | 15.31 days | Electron Capture | 100.00% |
| 206 | 6.243 days | Electron Capture | 100.00% |
| 206m | 0.89 milliseconds | Isomeric Transition | 100.00% |
| 207 | 31.55 years | Electron Capture | 100.00% |
| 208 | 3.68×10+5 years | Electron Capture | 100.00% |
| 208m | 2.58 milliseconds | Isomeric Transition | 100.00% |
| 209 | 1.9×10+19 years | Alpha Decay | 100.00% |
| 210 | 5.012 days | Beta-minus Decay | 100.00% |
| Alpha Decay | 1.3×10-4 % | ||
| 210m | 3.04×10+6 years | Alpha Decay | 100.00% |
| 211 | 2.14 minutes | Alpha Decay | 99.72% |
| Beta-minus Decay | 0.28% | ||
| 212 | 60.55 minutes | Beta-minus Decay | 64.06% |
| Alpha Decay | 35.94% | ||
| 212m | 25.0 minutes | Alpha Decay | 67.00% |
| Beta-minus Decay | 33.00% | ||
| Beta-minus Decay with delayed Alpha Decay | 30.00% | ||
| 212m1 | 7.0 minutes | Beta-minus Decay | 100.00% |
| 213 | 45.59 minutes | Beta-minus Decay | 97.80% |
| Alpha Decay | 2.20% | ||
| 214 | 19.9 minutes | Beta-minus Decay | 99.98% |
| Alpha Decay | 0.02% | ||
| 215 | 7.6 minutes | Beta-minus Decay | 100.00% |
| 215m | 36.9 seconds | Isomeric Transition | 76.2% |
| Beta-minus Decay | 23.8% | ||
| 216 | 2.25 minutes | Beta-minus Decay | <= 100.00% |
| 216m | 6.6 minutes | Beta-minus Decay | <= 100.00% |
| 217 | 98.5 seconds | Beta-minus Decay | 100.00% |
| 218 | 33 seconds | Beta-minus Decay | 100.00% |
| 219 | > 300 nanoseconds | Beta-minus Decay | No Data Available |
| 220 | > 300 nanoseconds | Beta-minus Decay | No Data Available |
| 221 | > 300 nanoseconds | Beta-minus Decay | No Data Available |
| Beta-minus Decay with delayed Neutron Emission | No Data Available | ||
| 222 | > 300 nanoseconds | Beta-minus Decay | No Data Available |
| 223 | > 300 nanoseconds | Beta-minus Decay | No Data Available |
| Beta-minus Decay with delayed Neutron Emission | No Data Available | ||
| 224 | > 300 nanoseconds | Beta-minus Decay | No Data Available |
| Beta-minus Decay with delayed Neutron Emission | No Data Available |
Citation and linking information
For questions about this page, please contact Carol McKisson.