A radioactive sample has initial concentration `N_(0)` of nuclei. Then,

Options

A. the number of undecayed nuclei present in thesample decays exponentially with time.
B. the activity (R) of the sample at any instant is directly proportional to the number of undecayed nuclei present in that sample at that time.
C. the no. of decayed nuclei grows exponentiallywith time.
D. the no. of decayed nuclei grow linearly with time.

Answer

A, B, C