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

254Fm     Half-life Boson, 100p 154n 3.24 h Spin 0 Parity 1 Show Decay Modes Hide Ultimate Decay Products Yield Nuclide 100.0441587592% 206Pb 1.890378000004×10-6% 205Tl 2.600104000006×10-9% 208Pb 1.69136013816×10-28% 160Dy 1.109685390816×10-32% 140Ce Unknown 172Yb Unknown 152Sm Unknown 180Hf Unknown 176Hf Unknown 156Gd Unknown 168Er Unknown 164Dy Atomic Weight 254.08685422 Abundance None Mass Excess 80.904186MeV Binding Energy 7.444786MeV Magnetic Moment 0 μ Quadrupole Moment N/A   Show Element Pictures. Also show decay chains leading to this isotope. Show only decays with probability >0.1%. Show Decay Image Smaller.

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