1.

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

Answer»

1 G of the sample
0.5 g of the sample
0.25 g of the sample
0.00 g of the sample

Solution :`T = t_(1//2) xx n, :. 3000 = 1500 XXN :. N =2`
`:.` Amount left `= (1)/(2^(2)) = (1)/(4) = 0.25 g`


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