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If a radioactive material has half life ...

If a radioactive material has half life of one year, a sample will be reduced to 1/8 of its mass in

A

2 years

B

3 years

C

4 years

D

6 years

Text Solution

Verified by Experts

The correct Answer is:
B
`lambda=0.693/T=0.693/1`
`=0.693` per year
`t=2.303/lambda log (N_(0)/N)=2.303/0.693" log"8/1`
`t=3.001` years
`~~ 3` years
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