The half-life period of a radioactive element x is same as the mean life time of another radioactive element y. Initially, both of them have the same number of atoms. Then,
(a) x and y have the same decay rate initially
(b) x and y decay at the same rate always
(c) y will decay at a faster rate than x
(d) x will decay at a faster rate than y

Options

A. X will decay faster than Y
B. Y will decay faster than X
C. X and Y have same decay rate initially
D. X and Y decay at same rate always

Answer

B