A certain radio isotope ( day) decays to give

CHEMISTRY · Subjective · US High School · Chemistry · Atomic Structure & Nuclear · Atomic Structure & Nuclear

Problem

A certain radio isotope

{}^{A}_{Z}X

(

t_{1/2} = 10

day) decays to give

{}^{A-4}_{Z-2}Y

. If one g-atom of

{}^{A}_{Z}X

is kept in a sealed vessel, how much He will accumulate in 20 day at STP?