Question
Physics Question on Radioactivity
B-122 has half life of 2 minutes experiment has to be done using Ba-122 and it take 10 minutes the setup the experiments if initially 80 gm of Ba-122 was taken how much Ba was left when experiment was started
A
2.5 gm
B
5 gm
C
10 gm
D
20 gm
Answer
2.5 gm
Explanation
Solution
The correct option is (A): 2.5 gm.