Half-life of radio active element `A` is 30 min while B is 20 min. Calculate ratio of number of nuclei decayed of A B after 60 min

Half life of a radio active element is 5 min . 10 sec . Time taken for 90% of it to disintergrate is nearly

Half-life of radioactive substance is 60 min. During 3 hrs, the fraction of total no. of atom have decayed would be

If half life of an radioactive element is 20min. Find the time interval of 33% decay and 67%

Half life of a radioactive substance is 60 min. After 3 hours, the fraction of total number of atoms that have decayed would be

The half life of radioactive element is 20 min . The time interval between the stages of its 33% and 67% decay is

The half life of radioactive element is 20 min . The time interval between the stages of its 33% and 67% decay is

The half-life of a radioactive element is 100 minutes . The time interval between the stage to 50% and 87.5% decay will be: a) 100 min b) 50 min c) 200 min d) 25 min