If `m g` of a radioactive species (molar mass `M)` has decay constant `lambda` The specis activity of sample at `t = ` is given by:

Options

A. `(lambda. N_(A))/(M)`
B. `(lambda.N_(A).m)/(M)`
C. `(lambda.m)/(M)`
D. `m-Me^(lambda)`

Answer

`(a)`

Explanation

Specific activity = Rate per `g = (lambda.N_(A)m)/(M xx m) = (lambda.N_(A))/(M)`