H Home Background Color: He Li Be Francium Main Page Black White Gray B C N O F Ne Na Mg Francium Pictures Page Al Si P S Cl Ar K Ca Francium 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 Francium (click to see decay chain): 199Fr  200Fr  201Fr  202Fr  203Fr  204Fr  205Fr  206Fr  207Fr  208Fr  209Fr  210Fr  211Fr  212Fr  213Fr  214Fr  215Fr  216Fr  217Fr  218Fr  219Fr  220Fr  221Fr  222Fr  223Fr  224Fr  225Fr  226Fr  227Fr  228Fr  229Fr  230Fr  231Fr  232Fr

201Fr     Half-life Boson, 87p 114n 61 ms Spin 9/2 Parity -1 Show Decay Modes Hide Ultimate Decay Products Yield Nuclide 3.36% 189Os 2.830928057072% 197Au 0.057072% 201Hg 2.83×10-6% 193Ir 2.016×10-6% 185Re 5.04×10-11% 181Ta Atomic Weight 201.003860867 Abundance None Mass Excess 3.596375MeV Binding Energy 7.714797MeV 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..