Periodic Table/Polonium/¹⁹⁹Po

← 198Po200Po →

¹⁹⁹Po

Polonium-199

Radioactive· Half-life: 5.47 min

Nuclear Propertiesbinding energy · spin-parity · abundance

Protons (Z)

84

Neutrons (N)

115

Mass Number (A)

199

Atomic Mass

198.983640AMU

Spin / Parity

3/2-

Binding E/A

7.602keV

Natural Abundance

Trace / None

Half-life

5.47 min

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

β⁺

92.5%

α

7.5%

Decay Chain

¹⁹⁹PoPolonium5.47 min

β⁺92.5%

α¹⁹⁵Pb7.50%

¹⁹⁹BiBismuth27.0 min

β⁺100.0%

¹⁹⁹PbLead1.50 h

β⁺100.0%

¹⁹⁹TlThallium7.42 h

β⁺100.0%

¹⁹⁹HgMercurySTABLE

5-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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