Periodic Table/Actinium/²¹¹Ac

← 210Ac212Ac →

²¹¹Ac

Actinium-211

Radioactive· Half-life: 213 ms

Nuclear Propertiesbinding energy · spin-parity · abundance

Protons (Z)

89

Neutrons (N)

122

Mass Number (A)

211

Atomic Mass

211.007669AMU

Spin / Parity

9/2-

Binding E/A

7.492keV

Natural Abundance

Trace / None

Half-life

213 ms

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

α

100.0%

β⁺

Decay Chain

²¹¹AcActinium213 ms

α100.0%

β⁺²¹¹Ra

²⁰⁷FrFrancium14.8 s

α95.0%

β⁺²⁰⁷Rn

²⁰³AtAstatine7.40 min

β⁺69.0%

α¹⁹⁹Bi31.0%

²⁰³PoPolonium36.7 min

β⁺99.9%

α¹⁹⁹Pb0.11%

²⁰³BiBismuth11.8 h

β⁺100.0%

²⁰³PbLead2.16 d

EC100.0%

²⁰³TlThalliumSTABLE

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

Other Isotopes of Actinium

205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237

← Back to ActiniumData: IAEA NDS · ENSDF