Unit 1: Topic 6 - Photoelectron Spectroscopy
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What is the photoelectric effect?
If light’s frequency is high enough, electrons will be emitted from a metal surface when the light strikes it.
What is frequency, and how does it relate to the photoelectric effect?
Frequency is the number of waves per second that pass a point in space. If the frequency of light hitting a piece of metal is low, the metal absorbs the light. If the frequency is high, a specific number of electrons are ejected from the metal.
What determines the position of each peak in a photoelectron spectrum?
The position of each peak is identified by the ionization energy of one or more electrons. The height represents the ratio of electrons in each level and orbital.
What determines the height (intensity) of each peak in a photoelectron spectrum?
The height of a peak represents the ratio of the number of electrons in that orbital to the number in other orbitals.
If the peaks in a photoelectron spectrum are the same, it means that they have the same number of what?
Electrons
What does PES stand for?
photoelectron spectroscopy
What is the x-axis of a photoelectron spectrum?
Binding Energy (MJ/mol)
What is the y-axis of a photoelectron spectrum?
the relative number of electrons
From right to left on a photoelectron spectrum, it goes from what to what?
low energy to high energy