H Home Background Color: He Li Be Nobelium Main Page Black White Gray B C N O F Ne Na Mg Nobelium Pictures Page Al Si P S Cl Ar K Ca Nobelium 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 Nobelium (click to see decay chain): 248No  249No  250No  251No  252No  253No  254No  255No  256No  257No  258No  259No  260No  261No  262No  263No  264No

257No     Half-life Fermion, 102p 155n 25 s Spin 7/2 Parity 1 Hide Decay Modes Probability Mode Decay Energy Daughter 85% α 8.4661MeV 253Fm 15% β+ 222.1keV 257Md Show Ultimate Decay Products Atomic Weight 257.09687719 Abundance None Mass Excess 90.240522MeV Binding Energy 7.409683MeV Magnetic Moment N/A 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..