PERIODIC ELEMENT
Rn (Radon)

 



Atomic number : 86
Atomic mass : 222 g.mol-1
Density : 9.96*10-3 g.cm-3 at 20 °C
Melting point : - 71 °C
Boiling point : - 62 °C
Vanderwaals radius : unknown
Isotopes : 7
Electronic shell : [Xe] 4f14 5d10 6s2 6p6
Energy of first ionisation : 1037 kJ.mol-1
Discovered by : Fredrich Ernst Dorn in 1898
 
Atomic Structure Uses (treatment of cancer)