Periodic Table/Radium/²²⁵Ra

← 224Ra226Ra →

²²⁵Ra

Radium-225

Radioactive· Half-life: 14.8 d

Nuclear Propertiesbinding energy · spin-parity · abundance

Protons (Z)

88

Neutrons (N)

137

Mass Number (A)

225

Atomic Mass

225.023611AMU

Spin / Parity

1/2-

Binding E/A

7.468keV

Natural Abundance

Trace / None

Half-life

14.8 d

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

β⁻

100.0%

Decay Chain

²²⁵RaRadium14.8 d

β⁻100.0%

²²⁵AcActinium9.92 d

α100.0%

¹⁴C²¹¹Bi5.30%

²²¹FrFrancium4.80 min

α100.0%

¹⁴C²⁰⁷Tl8.80%

β⁻²²¹Ra0.00%

²¹⁷AtAstatine32.6 ms

α100.0%

β⁻²¹⁷Rn0.01%

²¹³BiBismuth45.6 min

β⁻97.9%

α²⁰⁹Tl2.09%

²¹³PoPolonium3.71 μs

α100.0%

²⁰⁹PbLead3.23 h

β⁻100.0%

²⁰⁹BiBismuth20100000000 Gy

α100.0%

²⁰⁵TlThalliumSTABLE

9-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

← Back to RadiumData: IAEA NDS · ENSDF