Periodic Table/Radium/²²⁹Ra

← 228Ra230Ra →

²²⁹Ra

Radium-229

Radioactive· Half-life: 4.00 min

Nuclear Propertiesbinding energy · spin-parity · abundance

Protons (Z)

88

Neutrons (N)

141

Mass Number (A)

229

Atomic Mass

229.034957AMU

Spin / Parity

5/2

Binding E/A

7.432keV

Natural Abundance

Trace / None

Half-life

4.00 min

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

β⁻

100.0%

Decay Chain

²²⁹RaRadium4.00 min

β⁻100.0%

²²⁹AcActinium1.04 h

β⁻100.0%

²²⁹ThThorium7.92 ky

α100.0%

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

12-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