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Atoms and Nucle...

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  • Question 1
    4 / -1

    In a sample of hydrogen like atoms all of which are in ground state, a photon beam containing photons of various energies is passed. In absorption spectrum, five dark lines, are observed. The number of bright lines in the emission spectrum will be (assume that all transitions takes place)

  • Question 2
    4 / -1

    A hydrogen atom emits a photon corresponding to an electron transition from n = 5 to n = 1. The recoil speed of hydrogen atom is almost (mass of proton 1.6 × 10–27 kg)

  • Question 3
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    Number of nuclei of a radioactive substance at time t = 0 are 1000 and 900 at time t = 2 s. Then number of nuclei at time t = 4 s will be

  • Question 4
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    The ratio between total acceleration of the electron in singly ionized helium atom and hydrogen atom (both in ground state) is

  • Question 5
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    If the series limit of Lymen series for Hydrogen atom is equal to the series limit of Balmer series for a hydrogen like atom, then atomic number of this hydrogen like atom will be

  • Question 6
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    Number of spectral lines in hydrogen atom is.

  • Question 7
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    which of these is a fusion reduction

  • Question 8
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    Nucleon is common name for

  • Question 9
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  • Question 10
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