The radioactive isotope `.^(137)Cs` has a half life period of 30 years. Staring with 1 mg of
Channel: Doubtnut
Date: 2020-03-29

PThe radioactive isotope `.^(137)Cs` has a half life period of 30 years. Staring with 1 mg of `.^(137)Cs`. How much would remain after 120 years?