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  3. JEE Main & Advanced

JEE Main & Advanced Sample Paper JEE Main - Mock Test - 18

  • question_answer
    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 of the radioactive sample is ____ mg.        

    Answer:

    1.0


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