How do we learn things by looking at the chlorine spectra in absorption?
We take advantage of the affinity that X-rays have for inner shell electrons.
And the fact that transition energies for these so-called Ka lines depend very little on the ionization stage; in other words, the outer electrons hardly affect the wavelengths of these lines at all
hnx
1s
2p
2s
Beryllium-like
Helium-like
hnx
energy
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