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Rutherford's Set up and Predictions

The half-life...

Question

The half-life period of a radioactive substance is $2 m i n$ . The time taken for $1 g$ of the substance to reduce to $0.25 g$ will be :

A

2

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B

4

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C

6

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D

8

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Solution

The correct option is B $4$
If half-life time of sample is 2 min for 1g sample, then after 2 min it becomes 0.5g, after 4 min it becomes 0.25g.

Hence, option B is correct.

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