Periodic Table/Astatine/¹⁹⁷At

← 196At198At →

¹⁹⁷At

Astatine-197

Radioactive· Half-life: 388 ms

Nuclear Propertiesbinding energy · spin-parity · abundance

Protons (Z)

85

Neutrons (N)

112

Mass Number (A)

197

Atomic Mass

196.993177AMU

Spin / Parity

9/2-

Binding E/A

7.545keV

Natural Abundance

Trace / None

Half-life

388 ms

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

α

96.1%

β⁺

3.9%

Decay Chain

¹⁹⁷AtAstatine388 ms

α96.1%

β⁺¹⁹⁷Po3.90%

¹⁹³BiBismuth1.06 min

β⁺96.5%

α¹⁸⁹Tl3.50%

β⁺

¹⁹³TlThallium21.6 min

β⁺100.0%

¹⁹³HgMercury3.80 h

β⁺100.0%

¹⁹³AuGold17.6 h

β⁺100.0%

α¹⁸⁹Ir

¹⁹³PtPlatinum50.0 y

EC100.0%

¹⁹³IrIridiumSTABLE

8-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

← Back to AstatineData: IAEA NDS · ENSDF