Question

A photoelectron spectrum of sodium excited with x-rays with an energy of 1254 ev shows two peaks at kinetics energies of 1190 ev and 1223 ev. These peaks are assigned to the sodium 2s and 2p electrons. What is the energy of the 2s electron in sodium?.

Answer 1

When electrons move from a trajectory with a low energy level to a higher energy level, it absorbs energy called excitation.

At a certain stationary level electrons only have a certain level of energy anyway. The level of such energy is formulated.

`E_(n) =(-13.6z^(2) )/(n^(2) ) eV`

where Z denotes an atomic normor, and n denotes a particular shell or a certain quantum number of an electron's stationary trajectory.

2s is on second layer, so n = 2 and Z for Na is 11

Based on thus formula, energy for 2s electron is 1223 because we need higher energy to move from based layer than others