Periodic Table/Astatine/²⁰⁴At

← 203At205At →

²⁰⁴At

Astatine-204

Radioactive· Half-life: 9.12 min

Nuclear Propertiesbinding energy · spin-parity · abundance

Protons (Z)

85

Neutrons (N)

119

Mass Number (A)

204

Atomic Mass

203.987251AMU

Spin / Parity

7+

Binding E/A

7.591keV

Natural Abundance

Trace / None

Half-life

9.12 min

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

β⁺

96.2%

α

3.8%

Decay Chain

²⁰⁴AtAstatine9.12 min

β⁺96.2%

α²⁰⁰Bi3.80%

²⁰⁴PoPolonium3.52 h

β⁺99.3%

α²⁰⁰Pb0.67%

²⁰⁴BiBismuth11.2 h

β⁺100.0%

²⁰⁴PbLeadSTABLE

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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