Name       : Radon
Symbol     : Rn
Atomic #   : 86
Atom weight: 222
Melting P. : -71
Boiling P. : -62
Oxidation  : 0
Pronounced : RAY-don
From       : A variation of the name of another element, radium
Identified : Friedrich E. Dorn in 1900
Appearance : Heavy radioactive gas
Note       : Original name was niton, "shining"
             
[Properties]

  Radon is located at the bottom of the list of noble gasses in Group 0 of
the periodic chart. Studies of this gas show that it fits the general mold
for the so-called "inert" gasses.
  Radon gas liquifies easily and changes to its solid state at just -71
degrees. As a solid, it glows with yellow light that turns red-orange as
the temperature is lowered further.
  The only confirmed compound of radon is radon fluoride, RnF.