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Atoms and Nuclei Test - 126

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Atoms and Nuclei Test - 126
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  • Question 1
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    If half-life of a substance is 3.8 days and its quantity is 10.38 g. Then substance quantity remaining left after19 days will be
    Solution

  • Question 2
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    After five half lives what will be the fraction of initial substance
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  • Question 3
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    Which is the correct expression for half-life?
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  • Question 4
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    The activity of a radioactive sample is 1.6 curie and its half-life is 2.5 days. Its activity after 10 days will be
    Solution

  • Question 5
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    In a mean life of a radioactive sample
    Solution

  • Question 6
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    During mean life of a radioactive element, the fraction that disintegrates is
    Solution

  • Question 7
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    When a radioactive substance emits an α–particle, its position in the periodic table is lowered by
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  • Question 8
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    Solution

  • Question 9
    4 / -1
    In which of the following decay, the element does not change?
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  • Question 10
    4 / -1
    A radioactive nucleus with Z protons and N neutrons emits anα–particle, 2beta–particles and 2 gamma rays. The number of protons and neutrons in the nucleus leftafter the decay respectively, are
    Solution

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