Question
Question: A radioactive sample with a half life of 1 month has the label : “Activity=2 micro curies on 1.8.199...
A radioactive sample with a half life of 1 month has the label : “Activity=2 micro curies on 1.8.1991.'' What will be its activity two months later.
A
1.0 micro curies
B
0.5 micro curies
C
4 micro curies
D
8 micro curies
Answer
0.5 micro curies
Explanation
Solution
In two half lives, the activity becomes one fourth.