Periodic Table of Elements
Th - Thorium
Thorium Menu
- Thorium Page One
- Thorium Page Two
Nuclides / Isotopes
| Nuc- lide | Atomic Mass | NN | Abun % | Spin | Half Life | DM | DT | BR % | Decay Energy (MeV) |
|---|---|---|---|---|---|---|---|---|---|
| Th210 | 120 | Syn | 0+ | 9ms | |||||
| Th211 | 121 | Syn | 37ms | ||||||
| Th212 | 212.013 | 122 | Syn | 0+ | 30ms |  | Ac212 | ~0.30 | 4.760 |
| 30ms |  | Ra208 | 7.952 | ||||||
| Th213 | 213.013 | 123 | Syn | 140ms | | Ra209 | <=100 | 7.840 | |
| Th214 | 214.011 | 124 | Syn | 0+ | 100ms | | Ra210 | 7.826 | |
| Th215 | 215.0117 | 125 | Syn | 1/2- | 1.2s | | Ra211 | 7.666 | |
| Th216 | 216.0111 | 126 | Syn | 0+ | 0.028s | | Ac216 | ~0.01 | 2.170 |
| 0.028s | | Ra212 | 8.071 | ||||||
| meta state 2.028MeV | Syn | 8+, 11- | 180us | IT | Th216 | ~97 | 2.028 | ||
| 180us | | Ra212 | ~3 | 10.099 | |||||
| Th217 | 217.0131 | 127 | Syn | 9/2+ | 0.252ms | | Ra213 | 9.424 | |
| Th218 | 218.0133 | 128 | Syn | 0+ | 109ns | | Ra214 | 9.849 | |
| Th219 | 219.0155 | 129 | Syn | 1.05us | | Ra215 | 9.510 | ||
| Th220 | 220.0157 | 130 | Syn | 0+ | 9.7us | | Ac220 | 2.0E -7 | 0.910 |
| 9.7us | | Ra216 | 8.953 | ||||||
| Th221 | 221.0182 | 131 | Syn | 7/2+ | 1.68ms | | Ra217 | 8.628 | |
| Th222 | 222.0185 | 132 | Syn | 0+ | 2.8ms | | Ra218 | 8.129 | |
| Th223 | 223.0208 | 133 | Syn | 5/2+ | 0.60s | | Ra219 | 7.567 | |
| Th224 | 224.0215 | 134 | Syn | 0+ | 1.05s | | Ra220 | 7.304 | |
| Th225 | 225.0239 | 135 | Syn | 3/2+ | 8.72m | | Ra221 | ~90 | 6.922 |
| 8.72m | | Ac225 | ~10 | 0.675 | |||||
| Th226 | 226.0249 | 136 | Syn | 0+ | 30.57m | | Ra222 | 6.451 | |
| Th227 | 227.0277 | 137 | Syn | 1/2+ | 18.72d | | Ra223 | 6.146 | |
| Th228 | 228.0287 | 138 | Syn | 0+ | 1.9116y | | Ra224 | 5.520 | |
| Th229 | 229.0318 | 139 | Syn | 5/2+ | 7340y | | Ra225 | 5.168 | |
| Th230 | 230.0331 | 140 | Syn | 0+ | 75380y | SF | <=5.E -1 | ||
| 75380y | | Ra226 | 4.770 | ||||||
| Th231 | 231.0363 | 141 | Syn | 5/2+ | 25.52h | | Ra227 | ~1.0E -8 | 4.213 |
| 25.52h |  - | Pa231 | 0.389 | ||||||
| Th232 | 232.0381 | 142 | 100. | 0+ | 1.405E 10y | SF | <1.0E -9 | ||
| 1.405E 10y | | Ra228 | 4.083 | ||||||
| Th233 | 233.0416 | 143 | Syn | 1/2+ | 22.3m | - | Pa233 | 1.245 | |
| Th234 | 234.0436 | 144 | Syn | 0+ | 24.10d | - | Pa234 | 0.273 | |
| Th235 | 235.0475 | 145 | Syn | 1/2+ | 7.1m | - | Pa235 | 1.930 | |
| Th236 | 236.05 | 146 | Syn | 0+ | 37.5m | - | Pa236 | ||
| Th237 | 147 | Syn | 5m | ||||||
| Th238 | 148 | Syn | |||||||
| Nuclide | Potential Parent Nuclides |
|---|---|
| Th210 | None known |
| Th211 | None known |
| Th212 | None known |
| Th213 | None known |
| Th214 | U218 (Syn) |
| Th215 | U219 (Syn) |
| Th216 | Pa216 (Syn) Th216m (Syn) |
| meta state 2.028MeV | None known |
| Th217 | None known |
| Th218 | U222 (Syn) |
| Th219 | U223 (Syn) |
| Th220 | Pa220 (Syn) U224 (Syn) |
| Th221 | U225 (Syn) |
| Th222 | U226 (Syn) |
| Th223 | U227 (Syn) |
| Th224 | Ac224 (Syn) U228 (Syn) |
| Th225 | U229 (Syn) |
| Th226 | Ac226 (Syn) Pa226 (Syn) U230 (Syn) |
| Th227 | Ac227 (Natural) Pa227 (Syn) U231m (Syn) |
| Th228 | Ac228 (Syn) Pa228 (Syn) U232 (Syn) |
| Th229 | Ac229 (Syn) Pa229 (Syn) U233 (Syn) |
| Th230 | Ac230 (Syn) Pa230 (Syn) U234 (Natural) |
| Th231 | Ac231 (Syn) Pa231 (Natural) U235 (Natural) |
| Th232 | Ac232 (Syn) Pa232 (Syn) U236 (Syn) |
| Th233 | Ac233 (Syn) |
| Th234 | Ac234 (Syn) U238 (Natural) |
| Th235 | None known |
| Th236 | None known |
| Th237 | None known |
| Th238 | None known |
Key:
| |
Thorium Menu
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Related Resources
- Anatomy of the Atom
Answers many questions regarding the structure of atoms. - Molarity, Molality and Normality
Introduces stoichiometry and explains the differences between molarity, molality and normality. - Molar Mass Calculations and Javascript Calculator
Molar mass calculations are explained and there is a JavaScript calculator to aid calculations. - Chemical Database
This database focuses on the most common chemical compounds used in the home and industry.
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