Notes
| Isotopes of Thorium |
| Notes
|
| Thorium has no stable isotopes. |
 Notable Isotopes  |
 228Th [138 neutrons] |
 Abundance: Synthetic
|
| Half life: 1.9116 years [ Alpha Decay ]
|
| Decay Energy: 5.520 MeV |
| Decays to 224Ra.
|
| 229Th [139 neutrons] |
| Abundance: Synthetic
|
| Half life: 7340 years [ Alpha Decay ]
|
| Decay Energy: 5.168 MeV |
| Decays to 225Ra.
|
| 230Th [140 neutrons] |
| Abundance: Synthetic
|
| Half life: 75380 years [ Alpha Decay ]
|
| Decay Energy: 4.770 MeV |
| Decays to 226Ra.
|
| 232Th [142 neutrons] |
| Abundance: 100%
|
| Half life: 1.4505 x 1010years [ Alpha Decay ]
|
| Decay Energy: 4.083 MeV |
| Decays to 228Ra.
|