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

86 – Rn – Radon

Rn Rn-220 (half life 56 seconds) is part of the decay chain of Th-232, so traces of Radon are released by the thorium oxide shown here. Amount: 0.9 g Thorium oxide, corresponding to 6 ag or 16000 atoms of Rn-220.

Physical and chemical data
Atomic mass222.0176
Density9.23e-3 g·cm-3
Melting point-71 °C
Boiling point-61.8 °C
Abundance6.00e-16 %
Oxydation levels2
Electron configuration[Xe]4f14 5d10 6s2 6p6

  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  
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