Periodic Table/Astatine/²¹⁶At

← 215At217At →

²¹⁶At

Astatine-216

Radioactive· Half-life: 300 μs

Nuclear Propertiesbinding energy · spin-parity · abundance

Protons (Z)

85

Neutrons (N)

131

Mass Number (A)

216

Atomic Mass

216.002423AMU

Spin / Parity

1-

Binding E/A

7.552keV

Natural Abundance

Trace / None

Half-life

300 μs

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

α

100.0%

β⁻

EC

Decay Chain

²¹⁶AtAstatine300 μs

α100.0%

β⁻²¹⁶Rn

EC²¹⁶Po

²¹²BiBismuth1.01 h

β⁻64.1%

α²⁰⁸Tl35.9%

β⁻α²⁰⁸Pb0.01%

²¹²PoPolonium294 ns

α100.0%

²⁰⁸PbLeadSTABLE

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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