01 About Radon
A radioactive gas produced by decay of uranium in rocks. The second leading cause of lung cancer (after smoking) - it seeps into basements from rock. Half-life: 3.82 days.
02 Physical Properties
State at room temperature๐จ Gas
Melting point-71 ยฐC
Boiling point-61.7 ยฐC
Density0.00973 g/cmยณ
Atomic mass222 u
Electron configuration2,8,18,32,18,8
Period / GroupPeriod 6, Group 18
BlockP-block
03 Discovery
Radon was discovered in 1900 by Dorn.