Periodic Table/Thorium/²¹⁸Th

← 217Th219Th →

²¹⁸Th

Thorium-218

Radioactive· Half-life: 122 ns

Nuclear Propertiesbinding energy · spin-parity · abundance

Protons (Z)

90

Neutrons (N)

128

Mass Number (A)

218

Atomic Mass

218.013276AMU

Spin / Parity

0+

Binding E/A

7.481keV

Natural Abundance

Trace / None

Half-life

122 ns

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

α

100.0%

Decay Chain

²¹⁸ThThorium122 ns

α100.0%

²¹⁴RaRadium2.44 s

α99.9%

β⁺²¹⁴Fr0.06%

²¹⁰RnRadon2.40 h

α96.0%

β⁺²¹⁰At

²⁰⁶PoPolonium8.80 d

β⁺94.5%

α²⁰²Pb5.45%

²⁰⁶BiBismuth6.24 d

β⁺100.0%

²⁰⁶PbLeadSTABLE

6-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