H Home Background Color: He Li Be Fermium Main Page Black White Gray B C N O F Ne Na Mg Fermium Pictures Page Al Si P S Cl Ar K Ca Fermium Technical Data Sc Ti V Cr Mn Fe Co Ni Cu Zn Ga Ge As Se Br Kr Rb Sr Y Zr Nb Mo Tc Ru Rh Pd Ag Cd In Sn Sb Te I Xe Cs Ba La Ce Pr Nd Pm Sm Eu Gd Tb Dy Ho Er Tm Yb Lu Hf Ta W Re Os Ir Pt Au Hg Tl Pb Bi Po At Rn Fr Ra Ac Th Pa U Np Pu Am Cm Bk Cf Es Fm Md No Lr Rf Db Sg Bh Hs Mt Ds Rg Cn Nh Fl Mc Lv Ts Og

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

258Fm     Half-life Boson, 100p 158n 370 µs Spin 0 Parity 1 Hide Decay Modes Probability Mode Decay Energy Daughter 100% SF N/A Variable Unknown α 6.66MeV 254Cf Hide Ultimate Decay Products Yield Nuclide Unknown 172Yb Unknown 205Tl Unknown 152Sm Unknown 208Pb Unknown 206Pb Unknown 180Hf Unknown 176Hf Unknown 156Gd Unknown 168Er Unknown 164Dy Unknown 160Dy Unknown 140Ce Atomic Weight 258.097076 Abundance None Mass Excess 90.426MeV Binding Energy 7.418MeV Magnetic Moment 0 μ Quadrupole Moment N/A   Show Element Pictures. Also show decay chains leading to this isotope. Show all decays, even very low-probability.

Click any isotope in diagram to see its data. Decay chain image generated by Mathematica's GraphPlot and IsotopeData functions from Wolfram Research, Inc..