H Home Background Color: He Li Be Thorium Main Page Black White Gray B C N O F Ne Na Mg Thorium Pictures Page Al Si P S Cl Ar K Ca Thorium 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 Thorium (click to see decay chain): 209Th  210Th  211Th  212Th  213Th  214Th  215Th  216Th  217Th  218Th  219Th  220Th  221Th  222Th  223Th  224Th  225Th  226Th  227Th  228Th  229Th  230Th  231Th  232Th  233Th  234Th  235Th  236Th  237Th  238Th

209Th     Half-life Fermion, 90p 119n 3.8 ms Spin 5/2 Parity -1 Show Decay Modes Hide Ultimate Decay Products Yield Nuclide Unknown 205Tl Unknown 189Os Unknown 201Hg Unknown 193Ir Unknown 197Au Atomic Weight 209.017715682 Abundance None Mass Excess 16.502052MeV Binding Energy 7.655464MeV Magnetic Moment N/A Quadrupole Moment N/A   Show Isotope Symbols. 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..