Periodic Table/Astatine/²⁰²At

← 201At203At →

²⁰²At

Astatine-202

Radioactive· Half-life: 3.07 min

Nuclear Propertiesbinding energy · spin-parity · abundance

Protons (Z)

85

Neutrons (N)

117

Mass Number (A)

202

Atomic Mass

201.988626AMU

Spin / Parity

3+

Binding E/A

7.580keV

Natural Abundance

Trace / None

Half-life

3.07 min

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

β⁺

88.0%

α

12.0%

Decay Chain

²⁰²AtAstatine3.07 min

β⁺88.0%

α¹⁹⁸Bi12.0%

²⁰²PoPolonium44.6 min

β⁺98.1%

α¹⁹⁸Pb1.92%

²⁰²BiBismuth1.72 h

β⁺100.0%

α¹⁹⁸Tl1.00%

²⁰²PbLead52.5 ky

EC100.0%

²⁰²TlThallium12.3 d

EC100.0%

²⁰²HgMercurySTABLE

6-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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