Periodic Table/Astatine/¹⁹⁵At

← 194At196At →

¹⁹⁵At

Astatine-195

Radioactive· Half-life: 290 ms

Nuclear Propertiesbinding energy · spin-parity · abundance

Protons (Z)

85

Neutrons (N)

110

Mass Number (A)

195

Atomic Mass

194.996274AMU

Spin / Parity

1/2+

Binding E/A

7.525keV

Natural Abundance

Trace / None

Half-life

290 ms

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

α

100.0%

β⁺

Decay Chain

¹⁹⁵AtAstatine290 ms

α100.0%

β⁺¹⁹⁵Po

¹⁹¹BiBismuth12.4 s

α51.0%

β⁺¹⁹¹Pb

¹⁸⁷TlThallium?

β⁺100.0%

α¹⁸³Au

¹⁸⁷HgMercury1.90 min

β⁺100.0%

α¹⁸³Pt

¹⁸⁷AuGold8.30 min

β⁺100.0%

α¹⁸³Ir

¹⁸⁷PtPlatinum2.35 h

β⁺100.0%

¹⁸⁷IrIridium10.5 h

β⁺100.0%

¹⁸⁷OsOsmiumSTABLE

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

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