Periodic Table/Francium/¹⁹⁷Fr

198Fr →

¹⁹⁷Fr

Francium-197

Radioactive· Half-life: 2.30 ms

Nuclear Propertiesbinding energy · spin-parity · abundance

Protons (Z)

87

Neutrons (N)

110

Mass Number (A)

197

Atomic Mass

197.011008AMU

Spin / Parity

7/2-

Binding E/A

7.448keV

Natural Abundance

Trace / None

Half-life

2.30 ms

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

α

100.0%

Decay Chain

¹⁹⁷FrFrancium2.30 ms

α100.0%

¹⁹³AtAstatine29.0 ms

α100.0%

¹⁸⁹BiBismuth688 ms

α100.0%

β⁺¹⁸⁹Pb

¹⁸⁵TlThallium19.5 s

β⁺100.0%

α¹⁸¹Au

¹⁸⁵HgMercury49.1 s

β⁺94.0%

α¹⁸¹Pt6.00%

¹⁸⁵AuGold4.25 min

β⁺99.7%

α¹⁸¹Ir0.26%

¹⁸⁵PtPlatinum1.18 h

β⁺100.0%

α¹⁸¹Os0.01%

¹⁸⁵IrIridium14.4 h

β⁺100.0%

¹⁸⁵OsOsmium93.0 d

EC100.0%

¹⁸⁵ReRheniumSTABLE

10-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