H Home Background Color: He Li Be Astatine Main Page Black White Gray B C N O F Ne Na Mg Astatine Pictures Page Al Si P S Cl Ar K Ca Astatine 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 Astatine (click to see decay chain): 193At  194At  195At  196At  197At  198At  199At  200At  201At  202At  203At  204At  205At  206At  207At  208At  209At  210At  211At  212At  213At  214At  215At  216At  217At  218At  219At  220At  221At  222At  223At

204At     Half-life Fermion, 85p 119n 9.166666666667 m Spin 7 Parity 1 Hide Decay Modes Probability Mode Decay Energy Daughter 96.2% β+ 5.436MeV 204Po 3.8% α 6.06984MeV 200Bi Hide Ultimate Decay Products Yield Nuclide 4.43492% 200Hg Atomic Weight 203.987251326 Abundance None Mass Excess -11.875313MeV Binding Energy 7.803552MeV Magnetic Moment N/A Quadrupole Moment N/A   Show Element Pictures. Also show decay chains leading to this isotope. Show only decays with probability >0.1%.

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