Periodic Table/Polonium/²⁰⁵Po

← 204Po206Po →

²⁰⁵Po

Polonium-205

Radioactive· Half-life: 1.74 h

Nuclear Propertiesbinding energy · spin-parity · abundance

Protons (Z)

84

Neutrons (N)

121

Mass Number (A)

205

Atomic Mass

204.981190AMU

Spin / Parity

5/2-

Binding E/A

7.627keV

Natural Abundance

Trace / None

Half-life

1.74 h

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

β⁺

100.0%

α

0.0%

Decay Chain

²⁰⁵PoPolonium1.74 h

β⁺100.0%

α²⁰¹Pb0.04%

²⁰⁵BiBismuth14.9 d

β⁺100.0%

²⁰⁵PbLead17.0 My

EC100.0%

²⁰⁵TlThalliumSTABLE

4-step decay chain → stable · Primary path shown · branching ratios indicated

Other Isotopes of Polonium

186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227

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