Light from a discharge tube containing hydrogen atoms falls on the surface of a piece of sodium The kinetic - Chemistry - Atomic Structure

Question

Light from a discharge tube containing hydrogen atoms falls on the
surface of a piece of sodium The kinetic energy of the fastest
photoelectrons emitted from sodium is 0 73 eV The work function for
sodium is 1 82 eV Find (a) the energy of the photons causing the
photoelectric emission,
(b) the quantum numbers of the two levels involved in the emission
of these photons,

Akanksha C. · Accepted Answer

Dear Student,Energy = work function + Kinetic energyEnergy = 1
82 + 0 73 =2
55 eVThe energy of the photons causing the photoelectric emission is 2
55 eVb) Energy level of hydrogen atom are :E1 =-13
6 eVE2 =-3 4 eVE3 =-1 5eVE4 =-0
855∆E =E4-E2 =-0 855 eV+3 4=2
55 eVthe quantum numbers of the two levels involved in the emission of these photons are 2 and 4