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What will be half life period of a nucle...

What will be half life period of a nucleus if at the end of 4.2 days, N `=0.798 N_(0)` ?

A

15 days

B

10 days

C

12.83 days

D

20 days

Text Solution

Verified by Experts

The correct Answer is:
C
`lambda=(2.303)/(4.2)"log"(1)/(0.798)=0.548"log "1.25`
`=0.548xx0.09=0.053 "day"^(-1)`
`t_(1//2)=(0.693)/(0.053)=13` days
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