The half- life periof of a radioactive e...

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

A

1/2 g

B

1/4 g

C

1/8 g

D

1/16 g

Verified by Experts

The correct Answer is:

D

`N = (N_0)/(2^n) and n = (560)/(140)= 4 , N = 1/(2^4) = 1/(16) g`

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