Which noble gas is radioactive and is produced as a decay product of uranium and thorium?
A.
Argon
B.
Krypton
C.
Radon
D.
Neon
Correct answer is C
Radon is a radioactive noble gas and is produced as a decay product of uranium and thorium in the Earth's crust. It is colorless, odorless, and tasteless, making it potentially hazardous when it accumulates in enclosed spaces.
