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Isotopes of Fermium (click to see decay chain): 242Fm  243Fm  244Fm  245Fm  246Fm  247Fm  248Fm  249Fm  250Fm  251Fm  252Fm  253Fm  254Fm  255Fm  256Fm  257Fm  258Fm  259Fm  260Fm

243Fm     Half-life Fermion, 100p 143n 180 ms Spin 7/2 Parity 1 Hide Decay Modes Probability Mode Decay Energy Daughter 60% α 8.6891MeV 239Cf 39% β+ 3.454MeV 243Es 0.57% SF N/A Variable Hide Ultimate Decay Products Yield Nuclide 27.48324183704% 207Pb 2.439268491294×10-8% 205Tl 2.192603809629×10-10% 206Pb 2.713343602674×10-13% 208Pb Atomic Weight 243.074353 Abundance None Mass Excess 69.259MeV Binding Energy 7.464MeV Magnetic Moment N/A Quadrupole Moment N/A   Show Isotope Symbols. Also show decay chains leading to this isotope. Show all decays, even very low-probability. Show Decay Image Full Size.

Decay chain image generated by Mathematica's GraphPlot and IsotopeData functions from Wolfram Research, Inc..