A radioactive sample has a half-life of 1500 years. A sealed tube containing 1g of the sample will contain after 3000 years:
A
1g of the sample
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B
0.5g of the sample
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C
0.25g of the sample
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D
0.01g of the sample
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Solution
The correct option is C0.25g of the sample 3000 years is equal to 2 half -lives. After one half-life. amount left is 0.5g. After second half life, amount left is 0.25g.