A certain radioactive isotope decay has `alpha`-emission, `._(Z_(1))^(A_(1))X to ._(Z_(1)-2)^
Channel: Doubtnut
Date: 2020-03-29

A certain radioactive isotope decay has `alpha`-emission, `._(Z_(1))^(A_(1))X to ._(Z_(1)-2)^(A_(1)-4)Y` half life of X is 10 days. If 1 mol of X is taken initially in a sealed container, then what volume of helium will be collected at STP after 20 days?