Periodic Table/Francium/²⁰³Fr

← 202Fr204Fr →

²⁰³Fr

Francium-203

Radioactive· Half-life: 550 ms

Nuclear Propertiesbinding energy · spin-parity · abundance

Protons (Z)

87

Neutrons (N)

116

Mass Number (A)

203

Atomic Mass

203.000941AMU

Spin / Parity

9/2-

Binding E/A

7.513keV

Natural Abundance

Trace / None

Half-life

550 ms

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

α

100.0%

β⁺

Decay Chain

²⁰³FrFrancium550 ms

α100.0%

β⁺²⁰³Rn

¹⁹⁹AtAstatine7.02 s

α89.0%

β⁺¹⁹⁹Po

¹⁹⁵BiBismuth3.05 min

β⁺100.0%

α¹⁹¹Tl0.03%

¹⁹⁵PbLead15.0 min

β⁺100.0%

¹⁹⁵TlThallium1.16 h

β⁺100.0%

¹⁹⁵HgMercury10.7 h

β⁺100.0%

¹⁹⁵AuGold186 d

EC100.0%

¹⁹⁵PtPlatinumSTABLE

8-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