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

227Th     Half-life Fermion, 90p 137n 18.68055555556 d Spin 1/2 Parity 1 Hide Decay Modes Probability Mode Decay Energy Daughter 100% α 6.1466MeV 223Ra Show Ultimate Decay Products Atomic Weight 227.02770407 Abundance None Mass Excess 25.806176MeV Binding Energy 7.647452MeV Magnetic Moment N/A Quadrupole Moment N/A   Show Element Pictures. Show only decay products of this isotope. Show Decay Image Full Size.

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