Periodic Table/Thorium/²¹²Th

← 211Th213Th →

²¹²Th

Thorium-212

Radioactive· Half-life: 31.7 ms

Nuclear Propertiesbinding energy · spin-parity · abundance

Protons (Z)

90

Neutrons (N)

122

Mass Number (A)

212

Atomic Mass

212.013002AMU

Spin / Parity

0+

Binding E/A

7.465keV

Natural Abundance

Trace / None

Half-life

31.7 ms

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

α

100.0%

β⁺

Decay Chain

²¹²ThThorium31.7 ms

α100.0%

β⁺²¹²Ac

²⁰⁸RaRadium1.11 s

α87.0%

β⁺²⁰⁸Fr

²⁰⁴RnRadon1.24 min

α72.4%

β⁺²⁰⁴At

²⁰⁰PoPolonium11.5 min

β⁺88.9%

α¹⁹⁶Pb11.1%

²⁰⁰BiBismuth36.4 min

β⁺100.0%

²⁰⁰PbLead21.5 h

EC100.0%

²⁰⁰TlThallium1.09 d

β⁺100.0%

²⁰⁰HgMercurySTABLE

8-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