Periodic Table/Francium/²⁰⁸Fr

← 207Fr209Fr →

²⁰⁸Fr

Francium-208

Radioactive· Half-life: 59.1 s

Nuclear Propertiesbinding energy · spin-parity · abundance

Protons (Z)

87

Neutrons (N)

121

Mass Number (A)

208

Atomic Mass

207.997139AMU

Spin / Parity

7+

Binding E/A

7.543keV

Natural Abundance

Trace / None

Half-life

59.1 s

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

α

89.0%

β⁺

11.0%

Decay Chain

²⁰⁸FrFrancium59.1 s

α89.0%

β⁺²⁰⁸Rn11.0%

²⁰⁴AtAstatine9.12 min

β⁺96.2%

α²⁰⁰Bi3.80%

²⁰⁴PoPolonium3.52 h

β⁺99.3%

α²⁰⁰Pb0.67%

²⁰⁴BiBismuth11.2 h

β⁺100.0%

²⁰⁴PbLeadSTABLE

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

Other Isotopes of Francium

197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233

← Back to FranciumData: IAEA NDS · ENSDF