Periodic Table/Astatine/¹⁹⁴At

← 193At195At →

¹⁹⁴At

Astatine-194

Radioactive· Half-life: 286 ms

Nuclear Propertiesbinding energy · spin-parity · abundance

Protons (Z)

85

Neutrons (N)

109

Mass Number (A)

194

Atomic Mass

193.999231AMU

Spin / Parity

5-

Binding E/A

7.508keV

Natural Abundance

Trace / None

Half-life

286 ms

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

α

100.0%

β⁺

8.3%

β⁺SF

0.0%

Decay Chain

¹⁹⁴AtAstatine286 ms

α100.0%

β⁺¹⁹⁴Po8.30%

¹⁹⁰BiBismuth6.30 s

α77.0%

β⁺¹⁹⁰Pb23.0%

¹⁸⁶TlThallium3.50 s

β⁺

α¹⁸²Au

¹⁸⁶HgMercury1.38 min

β⁺100.0%

α¹⁸²Pt0.02%

¹⁸⁶AuGold10.7 min

β⁺100.0%

α¹⁸²Ir0.00%

¹⁸⁶PtPlatinum2.08 h

β⁺100.0%

α¹⁸²Os1.40%

¹⁸⁶IrIridium16.6 h

β⁺100.0%

¹⁸⁶OsOsmium2000000 Gy

α100.0%

¹⁸²WTungstenSTABLE

9-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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