Radon, radioactive

CAS RN: 10043-92-2

Color / Form

Colorless gas
Can be condensed to a colorless, transparent liquid (BP -61.8 deg C) and to an opaque, glowing solid
When cooled below the freezing point, radon exhibits a brilliant phosphorescence which becomes yellow as the temperature is lowered and orange-red at the temperature of liquid air.
Solid form exists as face-centered cubic crystals at normal pressure.
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