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

Options

A. 1g
B. 0.5 g
C. 0.25 g
D. 0 g

Answer

C

Explanation

No. of half lives in 3000 years =2
`:.C_(n)=(1)/(2^(n))=(1)/(2^(2))=(1)/(4)`
of initial concentration
`:.` Amount left =0.25 g