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Homework Help: The Bohr Model of the Hydrogen Atom

  1. Mar 10, 2010 #1
    A hydrogen atom in an excited state absorbs a photon of wavelength 434 nm. What were the initial and final states of the hydrogen atom?

    E = hf = Eu - El = 2.825 eV

    That's the difference in energy between the initial and final states.
     
  2. jcsd
  3. Mar 10, 2010 #2

    Doc Al

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    Staff: Mentor

    What's the expression for the energy levels in the Bohr model?
     
  4. Mar 10, 2010 #3
    En = (- E0) / n^2
     
  5. Mar 10, 2010 #4

    Doc Al

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    Staff: Mentor

    Good. Now start cranking out a few transitions and see if you can find a match. (The trial and error approach.)

    Hint: List the energies of the first few levels and then you can just subtract.
     
  6. Mar 10, 2010 #5
    Seriously? That's all I have to do? Isn't there usually a fancy way to manipulate the equations algebraically and find the "n"s? I tried to find a fancy way to solve for the "n"s but couldn't. Okay. I'll start plugging in values for n.
     
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