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Atoms and Nucle...

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  • Question 1
    4 / -1

    If the binding energy of electron in a hydrogen atom is 13.6 eV , the energy required to remove the electron from the second excited state of Li++ is

  • Question 2
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    A radioactive substance decays to 1/16 th of its initial activity in 40 days. the half life of the radioactive substance expressed in day is

  • Question 3
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  • Question 4
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    Two deutrons each of mass m fuse to form helium resulting in release of energy E the mass of helium formed is

  • Question 5
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    what percent of original radio active substances is left after 5 half life time

  • Question 6
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    In which region of electromagnetic spectrum does the Lyman series of hydrogen atom like

  • Question 7
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    In terms of Rydberg constant R. The wave number of first Balmer line is

  • Question 8
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    The hydrogen atom can give spectral lines in the series Lyman, Balmer and Paschen. which of the following statement is correct

  • Question 9
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    The ionigation energy of hydrogen atom is 13.6 eV. The ionigation energy of helium atom would be

  • Question 10
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    A gamma ray Photon creates an electron- Position Pair. If the rest mass energy of an electron is 0.5 MeV. and the total kinetic energy 0.7 MeV, then the energy of the gamma ray Photon must be

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