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The activity of a freshly prepared radioactive sample is 2×1015 disintegration per second. The mean life is 108 s. The mass of an atom of this radio isotope is 10−25 kg. The mass (in gram) of the radioactive sample is

Answer» The activity of a freshly prepared radioactive sample is 2×1015 disintegration per second. The mean life is 108 s. The mass of an atom of this radio isotope is 10−25 kg. The mass (in gram) of the radioactive sample is


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