H Home Background Color: He Li Be Protactinium Main Page Black White Gray B C N O F Ne Na Mg Protactinium Pictures Page Al Si P S Cl Ar K Ca Protactinium 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 Protactinium (click to see decay chain): 212Pa  213Pa  214Pa  215Pa  216Pa  217Pa  218Pa  219Pa  220Pa  221Pa  222Pa  223Pa  224Pa  225Pa  226Pa  227Pa  228Pa  229Pa  230Pa  231Pa  232Pa  233Pa  234Pa  235Pa  236Pa  237Pa  238Pa  239Pa  240Pa

222Pa     Half-life Fermion, 91p 131n 3.3 ms Spin ? Parity ? Hide Decay Modes Probability Mode Decay Energy Daughter 100% α 8.847MeV 218Ac Hide Ultimate Decay Products Yield Nuclide 100.175% 206Pb Atomic Weight 222.023742 Abundance None Mass Excess 22.116MeV Binding Energy 7.651MeV Magnetic Moment N/A Quadrupole Moment N/A   Show Isotope Symbols. Show only decay products of this isotope.

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