Periodic Table/Astatine/¹⁹⁸At

← 197At199At →

¹⁹⁸At

Astatine-198

Radioactive· Half-life: 4.47 s

Nuclear Propertiesbinding energy · spin-parity · abundance

Protons (Z)

85

Neutrons (N)

113

Mass Number (A)

198

Atomic Mass

197.992798AMU

Spin / Parity

3+

Binding E/A

7.550keV

Natural Abundance

Trace / None

Half-life

4.47 s

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

α

97.0%

β⁺

Decay Chain

¹⁹⁸AtAstatine4.47 s

α97.0%

β⁺¹⁹⁸Po

¹⁹⁴BiBismuth1.58 min

β⁺100.0%

α¹⁹⁰Tl0.46%

¹⁹⁴PbLead10.7 min

β⁺100.0%

α¹⁹⁰Hg7.30%

¹⁹⁴TlThallium33.0 min

β⁺100.0%

α¹⁹⁰Au

¹⁹⁴HgMercury447 y

EC100.0%

¹⁹⁴AuGold1.58 d

β⁺100.0%

¹⁹⁴PtPlatinumSTABLE

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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