The half-life period of a radioactive substance is 140 days. After how much time 15 g will decay from 16 g sample of it [AFMC 2002]

The half-life period of a radioactive substance is 140 days. After how

1.	The half-life period of a radioactive substance is 140 days. After how much time 15 g will decay from 16 g sample of it [AFMC 2002]
A.	140 days
B.	560 days
C.	280 days
D.	420 days
Answer» C. 280 days

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The half-life period of a radioactive substance is 140 days. After how much time 15 g will decay from 16 g sample of it [AFMC 2002]

The half-life period of a radioactive substance is 140 days. After how much time 15 g will decay from 16 g sample of it [AFMC 2002]

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