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Homework Help: The Bohr Model of the Hydrogen Atom

  1. Nov 2, 2006 #1
    The electron in a hydrogen atom is in the first excited state, when the electron acquires an additional 2.86 eV of energy. What is the quantum number n of the state into which the electron moves?

    I found the answer to be 5 but I don't know how. I thought I could use the following equation:

    En=-(13.6eV) * (z^2 / (nfinal)^2 - (ninitial)^2)

    En=-2.86
    z=1
    ninitial=2

    I solved for nfinal and had the answer as 3 but that was incorrect. Am I doing something wrong?

    Any help on this would be greatly appreciated! Thank you :)
     
  2. jcsd
  3. Nov 3, 2006 #2

    berkeman

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    Staff: Mentor

    It's been a long time since I worked with this kind of problem, but can you post a link to a web page with info on the energy levels of the hydrogen atom? If I had this problem and no textbook, I'd start with a directed google search....
     
  4. Nov 3, 2006 #3
    I know I tried to use Google and Yahoo with no help but the only web page I have is for the textbook itself (Cutnell, Johnson: Physics, 6th Edition). I have the right answer for my homework but I was just trying to figure out how. I guess I really wanted to know. LOL

    http://bcs.wiley.com/he-bcs/Books?action=index&itemId=0471151831&bcsId=1346

    Thank you for your advise!

    :smile:
     
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