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  1. The half life period of an isotope is 2 hours. After 6 hours what fraction of the initial quantity of the isotope will be left behind?

    2. A.

     1/6
    B.

     1/3
    C.

     1/8
    D.

     1/4

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    Answer : Option C

    Explanation :

    The half life period of an isotope is 2 hours. After 6 hours 1/8 of the original amount, or 12.5% of the isotope will be left behind.

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