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

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 :

Photons of equal energy were incident on two different gas samples. One sample containing H-atoms in the ground state and the other sample containing H-atoms in some excited state with a principle quantum number 'n'. The photonic beams totally ionise the H-atoms. If the difference in the kinetic energy of the ejected electrons in the two different cases is 12.75 eV . Then find the principal quantum number 'n' of the excited state.

Photons of equal energy were incident on two different gas samples. One sample containing H-atoms in the ground state and the other sample containing H-atoms in some excited state with a principle quantum number 'n'. The photonic beams totally ionise the H-atoms. If the difference in the kinetic energy of the ejected electrons in the two different cases is 12.75 eV . Then find the principal quantum number 'n' of the excited state.

Hydrogen like atoms (atomic number = Z ) in a sample are in excited state with principal quantum number n. The emission spectrum of the sample has 15 different lines. The second most energetic photon emitted by the sample has energy of 27.2 eV . Find Z.

In a hydrogen sample, if the atoms are excited to states with principal, quantum number 20, then the number of different wavelengths which may be observed in the spectrum is

Principal quantum number of an atom represents :

What is the maximum number of spectral lines emitted by a hydrogen atom when it is in the third excited state ?