Question

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(explanation must)

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

Answer 1

Answer:

please put easy question.i am in 4th standard this is so difficult to explain