light and electrons

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  • Light and electrons
    • energy levels
      • can only absorb and emit definite amounts of energy
      • move between their ground and excited states
    • absorption spectra
      • coloured background
      • black lines
      • lines correspond to frequency
      • electrons absorb photons and get promoted to their excited state, this producing the lines
      • radiation absorbed corresponds to deltaE=hv
    • Untitled
    • emission spectra
      • black background
      • coloured lines
      • electrons absorb a photon and get promoted, electrons then drop back to their ground state, this produces the lines
      • radiation emitted corresponds to deltaE=hv
      • coloured lines are different because frequency is different for each transition
    • shells
      • 1st
        • 2
      • 2nd
        • 8
      • 3rd
        • 18
      • 4th
        • 32
    • lyman
      • level 1
        • UV
    • balmer
      • level 2
        • visual
    • level 3,4,5
      • infrared
    • ionisation energy
      • the difference between ionisation point and the ground state
      • X --> X(^+) + e (^-)

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