Periodic Table/Astatine/²⁰⁶At

← 205At207At →

²⁰⁶At

Astatine-206

Radioactive· Half-life: 30.6 min

Nuclear Propertiesbinding energy · spin-parity · abundance

Protons (Z)

85

Neutrons (N)

121

Mass Number (A)

206

Atomic Mass

205.986646AMU

Spin / Parity

6+

Binding E/A

7.598keV

Natural Abundance

Trace / None

Half-life

30.6 min

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

β⁺

99.1%

α

0.9%

Decay Chain

²⁰⁶AtAstatine30.6 min

β⁺99.1%

α²⁰²Bi0.90%

²⁰⁶PoPolonium8.80 d

β⁺94.5%

α²⁰²Pb5.45%

²⁰⁶BiBismuth6.24 d

β⁺100.0%

²⁰⁶PbLeadSTABLE

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

Other Isotopes of Astatine

191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229

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