52 After a certain lapse of time the fraction of radioactive

Last updated: 6/8/2023

52 After a certain lapse of time the fraction of radioactive A radic polonium undecayed is found to be 12 5 of the initial quantity What is the duration of this time lapse if half life of polonium is 139 days processe for the se half life a 417 days b 500 days c 420 days d 512 days