Symbol Rn Atomic radius: pm - Fusion: kJ/Mole 2.89
Name Radon Ionic radius: pm - Boiling point: C -62
Atomic number 86 Electron affinity Unst anion Melting point: C -71
Atomic weight 222.0 1st  ion potential 10.75 Specific Heat Cap: J/(g K) 0.09
Classification Noble gas Natural form Gas Thermal Cond: W/(cm K) <0.001
Configuration [Xe]4f145d106s2p6 Crystal structure FCC Electrical Cond -
Oxidation states - Density 9.73 Abundance: mg/kg-crust <0.001
Electronegativity - Vaporization: kJ/Mole 18.1    
The longest lived isotope, radon-222, was discovered in 1900 by the German chemist, Friedrich E. Dorn. Uses - earthquake prediction, treatment of cancer