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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 1025 kg. The mass (in gram) of the radioactive sample is


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