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Nuclear Chemist...

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  • Question 1
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  • Question 2
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    The rate of disintegration of radioactive element changes from initial value of 10,000 dpm to 2,500 dpm in 50 days. The decay constant is

  • Question 3
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    If 3/4 quantity of radioactive element disintegrates in two hours, its half- life would be

  • Question 4
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    A radioactive isotope decays at such a rate that after 96 minutes, only 1/8 th of the original amount remains. The half-life of this nuclide in minutes is

  • Question 5
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    What is the half life of a radioactive substance if 87.5 % of any given amount of the substance disintegrates in 40 minutes ?

  • Question 6
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    The half – life period of polonium is 140 days. If one starts with 1 g of polonium, 75% of it would have undergone distintegration in

  • Question 7
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    The activity of a radioactive nuclide (X100) is 6.023 curie at a certain time ‘t’. If its disintegration constant is 3.7 × 104 Sec−1 , the mass of X after t sec is

  • Question 8
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  • Question 9
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  • Question 10
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