Question
Question: The half life of a radioactive element which has only \(\frac{1}{32}\) of its original mass left aft...
The half life of a radioactive element which has only 321 of its original mass left after a lapse of 60 days is.
A
12 days
B
32 days
C
60 days
D
64 days
Answer
12 days
Explanation
Solution
32N0=N0(21)60/T⇒5=T60⇒T=12days.