The half-line period of a radioactive element A is same as the mean life time of another radioactive element B. Initially both have the same number of atoms. Then

Options

A. A and B have the same decay rate initially
B. A and B decay at the same rate always
C. B will decay at faster rate than A
D. A will decay at faste rate then B

Answer

C

Explanation

B will decay at faster rate than A
`(t_(1//2))_(A) = (t_("mean"))_(B)`
`(0.6931)/(lambda_(A)) = (1)/(lambda_(B))`
`lambda_(A) = 0.6931 lambda_(B)`
` lambda_(A) lt lambda_(B)`