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Question

A radioactive sample has a half-life of 1500 years. A sealed tube containing 1 g of the sample will contain after 3000 years:

A
1 g of the sample
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B
0.5 g of the sample
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C
0.25 g of the sample
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D
0.01 g of the sample
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Solution

The correct option is C 0.25 g of the sample
3000 years is equal to 2 half -lives. After one half-life. amount left is 0.5 g. After second half life, amount left is 0.25 g.

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