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Fred Bayer | Rosenheim | Germany | (+49) 8031 86550 | fred@bayerf.de

89 – Ac – Actinium

Ac Ac-227 (half life 21.8 years) is part of the decay chain of U-235, so traces of Actinium exist in the pitchblende shown here. Amount: 0.1 g pitchblende, corresponding to 12 pg or 30 billion atoms of Ac-227.

Physical and chemical data
Atomic mass227.0278
Density10.07 g·cm-3
Melting point1050 °C
Boiling point3300 °C
Abundance6.00e-14 %
Electronegativy1
Oxydation levels3
Electron configuration[Rn]6d 7s2

H   He
Li Be   B C N O F Ne
Na Mg   Al Si P S Cl Ar
K Ca 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  
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