Spectroscopy Flashcards
What is transition?
The change in energy levels of electrons
What can absorbing a UV photon or a visible light photon do to an electron?
It can excite the electron . When the energy gained is equal to or greater than the difference in energy levels, it can jump to a higher energy level.
What will happen after the excited electron went to a higher energy level?
It will quickly return back to the lower energy level because the higher energy level is unstable. When it falls, it releases a photon with an energy equal to the difference in energy levels, which gives out light.
The greater the energy transition, the greater the …(starts with f)
Frequency of photons. This is because a higher frequency has more energy.
Suggest a way to identify elements with UV or visible light .
We can compare the colour of the light the elements emit when photons are released based on its emission spectrum.( From excited state to ground state)This is because the energy needed for transition is different for each element, and photons of different frequencies have different light.
Although photons of infrared do not have enough energy to excite electrons, they can still…
Cause the chemical bonds within molecules to vibrate in different ways.
How can we use Infrared to determine what types of chemical bonds are present?
Infrared photons will cause different chemical bonds to vibrate in different ways and absorb IR radiation of different wavelengths. We can use an IR absorption spectrum to determine the bonds.
We can find the concentration of solutions containing coloured compounds by …(it is a law)
Beer-Lambert law
The equation in Beer-Lambert law is…
A=elc
