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Atoms and Nucle...

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  • Question 1
    4 / -1

    During a negative beta decay

  • Question 2
    4 / -1

    The half-life period of radium is 1600 years. Its average life time will be

  • Question 3
    4 / -1

    What percentage of original radioactive atoms is left after five half lives?

  • Question 4
    4 / -1

    Beta rays emitted by a radioactive material are

  • Question 5
    4 / -1

    In the given reaction
    ZAA → Z–1YA → Z–1KA–4 → Z–1KA–4 radiations are emitted in the sequence

  • Question 6
    4 / -1

    Half life of Bi210 is 5 days. If we start with 50,000 atoms of this isotope, the number of atoms left over after 10 days is

  • Question 7
    4 / -1

    A nucleus of atomic mass A and atomic number Z emits β– particles. The atomic mass and atomic number of the resulting nucleus are

  • Question 8
    4 / -1

    The decay constant λ of the radioactive sample is the probability of decay of an atom in unit time, then

  • Question 9
    4 / -1

    If T is the half life of a radioactive material, then the fraction that would remain after a time T/2 is

  • Question 10
    4 / -1

    If the decay or disintegration constant of a radioactive substance is λ, then its half life and mean life are respectively
    ( loge 2 can be written as In 2)

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