Periodic Table/Radium/²⁰¹Ra

202Ra →

²⁰¹Ra

Radium-201

Radioactive· Half-life: 20.0 ms

Nuclear Propertiesbinding energy · spin-parity · abundance

Protons (Z)

88

Neutrons (N)

113

Mass Number (A)

201

Atomic Mass

201.012815AMU

Spin / Parity

3/2-

Binding E/A

7.446keV

Natural Abundance

Trace / None

Half-life

20.0 ms

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

α

100.0%

Decay Chain

²⁰¹RaRadium20.0 ms

α100.0%

¹⁹⁷RnRadon54.0 ms

α100.0%

β⁺¹⁹⁷At

¹⁹³PoPolonium399 ms

α100.0%

β⁺¹⁹³Bi

¹⁸⁹PbLead39.0 s

β⁺99.6%

α¹⁸⁵Hg0.42%

¹⁸⁹TlThallium2.30 min

β⁺100.0%

¹⁸⁹HgMercury7.60 min

β⁺100.0%

α¹⁸⁵Pt

¹⁸⁹AuGold28.7 min

β⁺100.0%

α¹⁸⁵Ir3.00%

¹⁸⁹PtPlatinum10.9 h

β⁺100.0%

¹⁸⁹IrIridium13.2 d

EC100.0%

¹⁸⁹OsOsmiumSTABLE

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

Other Isotopes of Radium

201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235

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