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The half-life period of a radioactive el...

The half-life period of a radioactive element is 140 days. After 560 days, one gram of the element will reduce

A

(1/2) g

B

(1/4) g

C

(1/8)g

D

(1/16)g

Text Solution

Verified by Experts

The correct Answer is:
D
A radiocative decay follows first order kinetics 4560 days are equivalent to four half lives hence the mass of radioactive element left is `(1//2^(4))` g i.e `(1//16)` g`
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