Periodic Table/Astatine/²²⁴At

← 223At225At →

²²⁴At

Astatine-224

Radioactive· Half-life: 2.50 min

Nuclear Propertiesbinding energy · spin-parity · abundance

Protons (Z)

85

Neutrons (N)

139

Mass Number (A)

224

Atomic Mass

224.029749AMU

Spin / Parity

2+

Binding E/A

7.457keV

Natural Abundance

Trace / None

Half-life

2.50 min

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

β⁻

100.0%

Decay Chain

²²⁴AtAstatine2.50 min

β⁻100.0%

²²⁴RnRadon1.78 h

β⁻100.0%

²²⁴FrFrancium3.33 min

β⁻100.0%

²²⁴RaRadium3.63 d

α100.0%

¹⁴C²¹⁰Pb4.00%

²²⁰RnRadon55.6 s

α100.0%

2β⁻²²⁰Ra

²¹⁶PoPolonium144 ms

α100.0%

2β⁻²¹⁶Rn

²¹²PbLead10.6 h

β⁻100.0%

²¹²BiBismuth1.01 h

β⁻64.1%

α²⁰⁸Tl35.9%

β⁻α²⁰⁸Pb0.01%

²¹²PoPolonium294 ns

α100.0%

²⁰⁸PbLeadSTABLE

10-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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