Latest IIT-JEE Aptitude Question SOLUTION: The activity of a freshly prepared radioactive sample is 10^10 disintegrations per second, whose mean life is
10^9 s. The mass of an atom of this radioisotope is 10^-25 kg. The mas
The activity of a freshly prepared radioactive sample is 10^10 disintegrations per second, whose mean life is
10^9 s. The mass of an atom of this radioisotope is 10^-25 kg. The mass (in mg) of the radioactive sample is