A) 10 min
B) 15 min
C) 5 min
D) \[7\frac{1}{2}\] min
Correct Answer: C
Solution :
The number of particles left undisintegrated, where,decay constant initial number of atoms andpresent number of atoms \[8={{e}^{\lambda \,t}}\] Taking log both sides, we get \[3\,\,\ln \,\,2=\lambda \,t\] Half life periodYou need to login to perform this action.
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