Solve this:
Q.65. 10.24 g radioactive substance has half life 3.8 days. After 19 days, its remaining quantity is :-
(1) 0.151 g
(2) 0.32 g
(3) 1.51 g
(4) 0.16 g
 

Dear Student ,
Here is a link which will help  you to solve this question with proper explanation .
https://www.meritnation.com/ask-answer/question/half-life-of-a-radioactive-substance-is-20-days-what-per/nuclei/7064517

Regards

  • -12
What are you looking for?