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The activity of a sample of Ti(Z=22) de...

The activity of a sample of Ti(Z=22) decreased by 90% over a period of 10 years . The half life of the sample is

A

5 years

B

2 years

C

3 years

D

10 years

Text Solution

Verified by Experts

The correct Answer is:
C
`k = (2.303)/(t) log (a)/(a-x) = (2.303)/(10) log (100)/(10)`
`k = (2.303)/(10) `
`t_(1//2) = (0.693)/(2.303) xx 10 = 3 `yrs
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