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 radioisotopes is 10^-25 kg. The mass (in mg) of the radioactive sample is 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 radioisotopes is 10^-25 kg. The mass (in mg) of the radioactive sample is September 16, 2021 Category: Chapter 18 - Atoms and Nuclei , JEE Mains Physics 2002-2019 Solved Video Solutions , Facebook Messenger WhatsApp Share this:TwitterFacebook Related