Periodic Table/Thorium/²⁰⁸Th

209Th →

²⁰⁸Th

Thorium-208

Radioactive· Half-life: 2.40 ms

Nuclear Propertiesbinding energy · spin-parity · abundance

Protons (Z)

90

Neutrons (N)

118

Mass Number (A)

208

Atomic Mass

208.017915AMU

Spin / Parity

0+

Binding E/A

7.431keV

Natural Abundance

Trace / None

Half-life

2.40 ms

Decay Modesoverview · half-life · α · β⁻ · β⁺

α

100.0%

Decay Chain

²⁰⁸ThThorium2.40 ms

α100.0%

²⁰⁴RaRadium60.0 ms

α100.0%

β⁺²⁰⁴Fr

²⁰⁰RnRadon1.09 s

α92.0%

β⁺²⁰⁰At

¹⁹⁶PoPolonium5.63 s

α94.0%

β⁺¹⁹⁶Bi

¹⁹²PbLead3.50 min

β⁺100.0%

α¹⁸⁸Hg0.01%

¹⁹²TlThallium9.60 min

β⁺100.0%

¹⁹²HgMercury4.85 h

EC100.0%

α¹⁸⁸Pt

¹⁹²AuGold4.94 h

β⁺100.0%

¹⁹²PtPlatinumSTABLE

9-step decay chain → stable · Primary path shown · branching ratios indicated

Other Isotopes of Thorium

208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239

← Back to ThoriumData: IAEA NDS · ENSDF