H Home Background Color: He Li Be Actinium Main Page Black White Gray B C N O F Ne Na Mg Actinium Pictures Page Al Si P S Cl Ar K Ca Actinium 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 Actinium (click to see decay chain): 206Ac  207Ac  208Ac  209Ac  210Ac  211Ac  212Ac  213Ac  214Ac  215Ac  216Ac  217Ac  218Ac  219Ac  220Ac  221Ac  222Ac  223Ac  224Ac  225Ac  226Ac  227Ac  228Ac  229Ac  230Ac  231Ac  232Ac  233Ac  234Ac  235Ac  236Ac

212Ac     Half-life Fermion, 89p 123n 930 ms Spin 6 Parity 1 Hide Decay Modes Probability Mode Decay Energy Daughter 97% α 7.5188MeV 208Fr 3% β+ 6.4478MeV 212Ra Hide Ultimate Decay Products Yield Nuclide 3.92181216% 200Hg 0.000113246831475% 208Pb Atomic Weight 212.007813822 Abundance None Mass Excess 7.278529MeV Binding Energy 7.708546MeV Magnetic Moment N/A Quadrupole Moment N/A   Show Isotope Symbols. Also show decay chains leading to this isotope. Show all decays, even very low-probability. Show Decay Image Full Size.

Decay chain image generated by Mathematica's GraphPlot and IsotopeData functions from Wolfram Research, Inc..