Characterisation part 1 Flashcards
Radiowaves
this causes the nucleu to flip up or down in a magnetic field
what is the difference between up or down with radiowaves ?
a radio photon
EM spectrum are
waves
microwaves
causes molecules to rotate
uses microwaves for spectroscopy techniques?
rotational
IR
This causes the bonds to vibrate
Visible light
causes Electrons in large conjugated molecule chemical bonds to move from ground state to an excited level
UV
the same as visible light but this can be done with smaller molecules.
leads to bonds breaking
X rays
eject core electrons from the molecule
why do x ray photon eject core electrons
the photon is equal to the energy that binds the core electron to the nucleus.
c
frequency * wavelength
wavenumber
1 / wavelength
do different elements have different energy levels?
yes
do different elements have different spectroscopy results?
yes
why do different elements have different energy levels ?
Each element has a different nuclear charge and the outermost electron(s) is responsible for the atomic emission spectrum.
Since the effective nuclear charge is different, those outermost electrons experience a different potential energy. Their kinetic energy is also different from element to element.
