H Home Background Color: He Li Be Promethium Main Page Black White Gray B C N O F Ne Na Mg Promethium Pictures Page Al Si P S Cl Ar K Ca Promethium 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 Promethium (click to see decay chain): 126Pm  127Pm  128Pm  129Pm  130Pm  131Pm  132Pm  133Pm  134Pm  135Pm  136Pm  137Pm  138Pm  139Pm  140Pm  141Pm  142Pm  143Pm  144Pm  145Pm  146Pm  147Pm  148Pm  149Pm  150Pm  151Pm  152Pm  153Pm  154Pm  155Pm  156Pm  157Pm  158Pm  159Pm  160Pm  161Pm  162Pm  163Pm

139Pm     Half-life Boson, 61p 78n 4.15 m Spin 5/2 Parity 1 Show Decay Modes Show Ultimate Decay Products Atomic Weight 138.916804082 Abundance None Mass Excess -77.496499MeV Binding Energy 8.285514MeV Magnetic Moment N/A Quadrupole Moment N/A   Show Isotope Symbols. Show only decay products of this isotope. 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..