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IB Chemistry - Atomic Structure III

Electron Arrangement

· IB Chemistry,IB,Chemistry,Atomic Structure,Electron Arrangement

Electron Arrangement

In IB chemistry, electrons are arranged in shells (energy levels), which contain sub shells (s,p,d,f)

The Hydrogen Spectrum provides evidence for this structure

  • A continuous spectrum contains all the wavelengths/frequencies/colour/energies of electromagnetic radiation
  • Hydrogen in a discharge tube shows a line spectrum, which contains only certain wavelengths/frequencies/colours/energies of electromagnetic radiation
  • The electron in hydrogen can be given extra energy by a fast moving electron in the discharge tube, which causes it to be promoted to a higher energy level
  • We can then see lines on the line spectrum of hydrogen at higher energy levels where the electron has been promoted
  • As we only see lines and not a continuous spectrum, this proves that the electron can only be in one place at one time, and so shells must exist.
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Drafted by Gina (Chemistry)

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