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Atomic Excitation

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In a mixture of He^(o+) gas H atom and He^(o+) ions Are excited to three respective first excited subsepuenly , H atom transfers its total excitation energy to He^(o+) ions by collision .Assuming that Bohr model of an atom is applicable , answer the following question If each hydrogen atom in the ground state of 1.0 mol of H atom is excited by absorbing photon of energy 8.4 eV, 12.09 eV and 15.0 eV of energy then the number of spectral lines emitted is equal to

Find the maximum number of photons number of photons emitted by an H-atom, if atom is excited to atates with principal quantum number four.

The value of wavelength radiation emitted by an H -atom, if atom is excited to state with principal quantum number four is :

the maximum number of photons emitted by an H -atom , if atom is excited to state with principal quantum number four is

A sample of hydrogen atom is excited to n=4 state. In the spectrum of emitted radiation, the number of lines in the ultraviolet and visible regions are respectively:

Assuming Bohr's model for Li^(++) atom, the first excitation energy of ground state of Li^(++) atom is

The ionization potential of H-atom is 13.6 V. The H-atoms in ground state are excited by mono chromatic radiations of photon energy 12.09 ev. Then the number of spectral lines emitted by the excited atoms, will be

A hydrogen-like atom in its first excited state has excitation energy of 91.8 eV. The energy required to remove the electron from its ion is:

When electron in a Bohr atom is excited then which of the following increases?