Atomic Structure - Creating Quantum Theory - Photoelectric Effect

5 important questions on Atomic Structure - Creating Quantum Theory - Photoelectric Effect

What is the photoelectric effect?

When light is shone onto a piece of metal, a small current flows thru metal
  • red light - no effect
  • blue light - causes e- motion

Why does dim blue light let e-s flow but not intense red light?


  • matter cannot occupy same place or space as another
  • 1 photon of light can strike the sodium panel @ particular area @ a time due to space requirements

What is cont. Spectrum?

All wvlngths can be seen (Rainbow)
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What is an electron transition?

Jump of an electron from one stationary (ground) state to another

What were the problems w/ Bohr's Model?

1. Only worked w/ hydrogen (H2)
  • in multi-electron atoms you find clusters of closely packed spectral lines in same colour region
    • MORE diff line spectra to determine Bohr's theory


2. Idea of e-s travelling in shells suggested tht exact location of an e- in an atom could be found - BUT NOT TRUE (proven by Heisenberg)

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