Periodic Table/Astatine/²⁰⁷At

← 206At208At →

²⁰⁷At

Astatine-207

Radioactive· Half-life: 1.81 h

Nuclear Propertiesbinding energy · spin-parity · abundance

Protons (Z)

85

Neutrons (N)

122

Mass Number (A)

207

Atomic Mass

206.985800AMU

Spin / Parity

9/2-

Binding E/A

7.604keV

Natural Abundance

Trace / None

Half-life

1.81 h

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

β⁺

90.0%

α

10.0%

Decay Chain

²⁰⁷AtAstatine1.81 h

β⁺90.0%

α²⁰³Bi10.0%

²⁰⁷PoPolonium5.80 h

β⁺100.0%

α²⁰³Pb0.02%

²⁰⁷BiBismuth31.2 y

β⁺100.0%

²⁰⁷PbLeadSTABLE

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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