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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)`

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The correct Answer is:
d
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