Periodic Table/Actinium/²²⁰Ac

← 219Ac221Ac →

²²⁰Ac

Actinium-220

Radioactive· Half-life: 26.4 ms

Nuclear Propertiesbinding energy · spin-parity · abundance

Protons (Z)

89

Neutrons (N)

131

Mass Number (A)

220

Atomic Mass

220.014755AMU

Spin / Parity

3-

Binding E/A

7.486keV

Natural Abundance

Trace / None

Half-life

26.4 ms

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

α

100.0%

β⁺

Decay Chain

²²⁰AcActinium26.4 ms

α100.0%

β⁺²²⁰Ra

²¹⁶FrFrancium700 ns

α100.0%

β⁺²¹⁶Rn

²¹²AtAstatine314 ms

α100.0%

β⁺²¹²Po

β⁻²¹²Rn

²⁰⁸BiBismuth368 ky

β⁺100.0%

²⁰⁸PbLeadSTABLE

5-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