What is the energy (kJ/mol) associated with the de-excitation of an electron from `n=6` to `n=2` in `He^(+)` ion?

What is the energy in eV requried to excite the electron from n=1 to n=2 state in hydrogen atom? (n=principal quantum number)

What is the energy in eV requried to excite the electron from n=1 to n=2 state in hydrogen atom? (n=principal quantum number)

The energy (in eV) required to excite an electron from n = 2 to n = 4 state in hydrogen atom is

The energy ( in eV ) required to excite an electron from n = 2 to n = 4 state in hydrogen atom is

The energy ( in eV ) required to excite an electron from n = 2 to n = 4 state in hydrogen atom is

The energy (in W) required to excite an electron from n = 2 to n = 4 state in hydrogen atom

Ligth emitted during the de excitation of electrons from n=3 to n=2, when incident on metal, photoelectrons following de excitations photoelectrons are just emitted from that metal. In which of the following de excitations photoelectric effect, is not possible ?

Ligth emitted during the de excitation of electrons from n=3 to n=2, when incident on metal, photoelectrons following de excitations photoelectrons are just emitted from that metal. In which of the following de excitations photoelectric effect, is not possible ?