Periodic Table/Astatine/²¹⁸At

← 217At219At →

²¹⁸At

Astatine-218

Radioactive· Half-life: 1.28 s

Nuclear Propertiesbinding energy · spin-parity · abundance

Protons (Z)

85

Neutrons (N)

133

Mass Number (A)

218

Atomic Mass

218.008696AMU

Spin / Parity

2

Binding E/A

7.530keV

Natural Abundance

Trace / None

Half-life

1.28 s

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

α

100.0%

β⁻

Decay Chain

²¹⁸AtAstatine1.28 s

α100.0%

β⁻²¹⁸Rn

²¹⁴BiBismuth19.9 min

β⁻100.0%

α²¹⁰Tl0.02%

β⁻α²¹⁰Pb0.00%

²¹⁴PoPolonium163 μs

α100.0%

²¹⁰PbLead22.2 y

β⁻100.0%

α²⁰⁶Hg1.90%

²¹⁰BiBismuth5.01 d

β⁻100.0%

α²⁰⁶Tl13.2%

²¹⁰PoPolonium138 d

α100.0%

²⁰⁶PbLeadSTABLE

7-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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