If `He^(+)` ion is in its first excited state then its ionization energy is

The groud state energy of hydrogen atom is -13.6 eV . When its electron is in first excited state, its exciation energy is

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:

The energy of electron in first excited state of H -atom is -3.4 eV its kinetic energy is

Define (i) Excitation energy (ii) Ionization energy

Find the quantum of the excited state of electrons in He^(+) ion which on transition to first excited state emit photons of wavelengths 108.5 nm . (R_(H)=1.09678xx10^(7) m^(-1))