Symbol: Rn
Atomic Number: 86
Atomic Weight: 222 (most stable)
Boiling Point: 211.4 K
Melting Point: 202 K
Density at 300K: 9.73 g/cm3
Covalent radius: ???
Atomic radius: 1.34
Atomic volume: 50.5 cm3/mol
First ionization potental: 10.748 V
Specific heat capacity: 0.094 Jg-1K-1
Thermal conductivity: 0.00364 Wm-1K-1
Electrical conductivity: ???*106Ω-1m-1
Heat of fusion: 2.9 kJ/mol
Heat of vaporization: 16.40 kJ/mol
Electronegativity: N/A (Pauling's)

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To the Periodic Table
(From radium) A heavy, radioactive, gaseous chemical element, one of the noble gases, generated by the radioactive decay of radium. Radon decays into polonium and alpha rays, and this radiation makes it useful in radiotherapy. High levels of radon exposure are associated with areas of granite rock. It can penetrate buildings through floors and walls and accumulate in the lungs, causing respiratory damage, including lung cancer.

Symbol: Rn
Atomic number: 86
Atomic weight: 222 (isotope with the longest known half-life)
Density (at 0°C with 1 atmosphere of pressure): 9.73 g/L
Melting point: -71°C
Boiling point: -61.7°C
Most common valence: 0
Ground state electron configuration: [Xe]4f145d106s26p6

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