1.6 Photoelectron Spectroscopy

Abbreviation of Photoelectron spectroscopy:

PES

Photoelectron spectroscopy (PES) is an experimental technique that measures:

the relative energies of electrons in atoms or molecules.

Photoelectron spectroscopy works by :

ejecting electrons from the materials using high energy electromagnetic radiation (like UV or x-rays) and then measuring the kinetic energy of those electrons.

The process photoelectron spectroscopy can be described as:

photoionization

PES graphs show the:

relative number of electrons and their corresponding binding energy

The binding energy can be described as:

the amount of energy needed to remove an electron from an atom

The electrons with the highest binding energy are the ones that have the ______ coulombic attraction to the nucleus

greatest

Why are electrons with the highest binding energy the ones that have the greatest coulombic attraction to the nucleus?

They are closest to the nucleus

The PES graphs directly correspond to the:

electron configuration

PES graphs are often set up so that the x axis gives the ______ values first.

largest

Can PES graphs show many orders of magnitude?

Yes

How can PES graphs show many orders of magnitude?

They are scaled

The highest value for the ionization energy (binding energy) will be the ______ electrons.

innermost

Does the PES graph provide additional evidence for the quantum mechanical model of the atom?

Yes

How does the PES graph provide additional evidence for the quantum mechanical model of the atom?

Shows that different peaks (representing subshells) have different energy levels

In PES graphs, peaks represent:

subshells