Periodic Table/Radium/²¹⁷Ra

← 216Ra218Ra →

²¹⁷Ra

Radium-217

Radioactive· Half-life: 1.95 μs

Nuclear Propertiesbinding energy · spin-parity · abundance

Protons (Z)

88

Neutrons (N)

129

Mass Number (A)

217

Atomic Mass

217.006323AMU

Spin / Parity

9/2+

Binding E/A

7.520keV

Natural Abundance

Trace / None

Half-life

1.95 μs

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

α

100.0%

Decay Chain

²¹⁷RaRadium1.95 μs

α100.0%

²¹³RnRadon19.5 ms

α100.0%

²⁰⁹PoPolonium124 y

α99.5%

β⁺²⁰⁹Bi0.45%

²⁰⁵PbLead17.0 My

EC100.0%

²⁰⁵TlThalliumSTABLE

5-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