It's Elemental
Isotopes of the Element Lead
Lead
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 |
| 204 | 1.4% | >= 1.4×10+17 years |
| 206 | 24.1% | STABLE |
| 207 | 22.1% | STABLE |
| 208 | 52.4% | STABLE |
Known Isotopes
| Mass Number | Half-life | Decay Mode | Branching Percentage |
| 178 | 0.12 milliseconds | Alpha Decay | 100.00% |
| 179 | 3.5 milliseconds | Alpha Decay | 100.00% |
| 180 | 4.2 milliseconds | Alpha Decay | 100.00% |
| 181 | 36 milliseconds | Alpha Decay | 100.00% |
| 181m | 45 milliseconds | Alpha Decay | < 100.00% |
| 182 | 55 milliseconds | Electron Capture | ~ 2.00% |
| Alpha Decay | ~ 98.00% | ||
| 183 | 535 milliseconds | Alpha Decay | ~ 90.00% |
| 183m | 415 milliseconds | Alpha Decay | 100.00% |
| 184 | 490 milliseconds | Alpha Decay | 80.00% |
| Electron Capture | 20.00% | ||
| 185 | 6.3 seconds | Electron Capture | No Data Available |
| Alpha Decay | 34.00% | ||
| 185m | 4.3 seconds | Alpha Decay | 50.00% |
| Electron Capture | No Data Available | ||
| 186 | 4.82 seconds | Electron Capture | 60.00% |
| Alpha Decay | 40.00% | ||
| 187 | 18.3 seconds | Electron Capture | 88.00% |
| Alpha Decay | 12.00% | ||
| 187m | 15.2 seconds | Electron Capture | 90.50% |
| Alpha Decay | 9.50% | ||
| 188 | 25.1 seconds | Electron Capture | 90.70% |
| Alpha Decay | 9.30% | ||
| 189 | 39 seconds | Electron Capture | 100.00% |
| Alpha Decay | < 1.00% | ||
| 189m | 50 seconds | Electron Capture | 100.00% |
| Alpha Decay | < 1.00% | ||
| 190 | 71 seconds | Alpha Decay | 0.40% |
| Electron Capture | 99.60% | ||
| 191 | 1.33 minutes | Electron Capture | 99.99% |
| Alpha Decay | 0.01% | ||
| 191m | 2.18 minutes | Electron Capture | 100.00% |
| Alpha Decay | ~ 0.02% | ||
| 192 | 3.5 minutes | Electron Capture | 99.99% |
| Alpha Decay | 5.9×10-3 % | ||
| 193 | No Data Available | Electron Capture | No Data Available |
| 193m | 5.8 minutes | Electron Capture | 100.00% |
| 194 | 10.7 minutes | Alpha Decay | 7.3×10-6 % |
| Electron Capture | 100.00% | ||
| 195 | ≈ 15 minutes | Electron Capture | 100.00% |
| 195m | 15.0 minutes | Electron Capture | 100.00% |
| 196 | 37 minutes | Electron Capture | No Data Available |
| Alpha Decay | <= 3.0×10-5 % | ||
| 197 | 8.1 minutes | Electron Capture | 100.00% |
| 197m | 42.9 minutes | Electron Capture | 81.00% |
| Isomeric Transition | 19.00% | ||
| 198 | 2.4 hours | Electron Capture | 100.00% |
| 199 | 90 minutes | Electron Capture | 100.00% |
| 199m | 12.2 minutes | Electron Capture | ~ 7.00% |
| Isomeric Transition | ~ 93.00% | ||
| 200 | 21.5 hours | Electron Capture | 100.00% |
| 201 | 9.33 hours | Electron Capture | 100.00% |
| 201m | 60.8 seconds | Isomeric Transition | 100.00% |
| 202 | 52.5×10+3 years | Electron Capture | 100.00% |
| 202m | 3.54 hours | Isomeric Transition | 90.50% |
| Electron Capture | 9.50% | ||
| 203 | 51.92 hours | Electron Capture | 100.00% |
| 203m | 6.21 seconds | Isomeric Transition | 100.00% |
| 203m1 | 480 milliseconds | Isomeric Transition | 100.00% |
| 204 | >= 1.4×10+17 years | Alpha Decay | No Data Available |
| 204m | 66.93 minutes | Isomeric Transition | 100.00% |
| 205 | 1.73×10+7 years | Electron Capture | 100.00% |
| 205m | 5.55 milliseconds | Isomeric Transition | 100.00% |
| 206 | STABLE | - | - |
| 207 | STABLE | - | - |
| 207m | 0.806 seconds | Isomeric Transition | 100.00% |
| 208 | STABLE | - | - |
| 209 | 3.253 hours | Beta-minus Decay | 100.00% |
| 210 | 22.20 years | Beta-minus Decay | 100.00% |
| Alpha Decay | 1.9×10-6 % | ||
| 211 | 36.1 minutes | Beta-minus Decay | 100.00% |
| 212 | 10.64 hours | Beta-minus Decay | 100.00% |
| 213 | 10.2 minutes | Beta-minus Decay | 100.00% |
| 214 | 26.8 minutes | Beta-minus Decay | 100.00% |
| 215 | 147 seconds | Beta-minus Decay | No Data Available |
| 216 | > 300 nanoseconds | Beta-minus Decay | No Data Available |
| 217 | > 300 nanoseconds | Beta-minus Decay | No Data Available |
| 218 | > 300 nanoseconds | Beta-minus Decay | No Data Available |
| 219 | > 300 nanoseconds | Beta-minus Decay | No Data Available |
| 220 | > 300 nanoseconds | Beta-minus Decay | No Data Available |
Citation and linking information
For questions about this page, please contact Carol McKisson.