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Thread: Designation of Electron Shells

  1. #1
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    Designation of Electron Shells

    The electron shells in orbit around an atom are designated K,L,M... What do these letters stand for? Who originated these designations? I can't find any reference to its origins in books or the web.

  2. #2
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    Not even wiki?
    Electron Shell

    Now, the only thing left is why start with K?
    EDIT: Found it over here.
    Similar to the reason early programming used large numbers in thier numbering. Just in case.

  3. #3
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    Thanks for the reference. I had never even heard of Barkla.

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    Quote Originally Posted by melech View Post
    The electron shells in orbit around an atom are designated K,L,M... What do these letters stand for? Who originated these designations? I can't find any reference to its origins in books or the web.

    In addition to the references listed (which are good) ---here is another one from:ChemTutor

    http://www.chemtutor.com/struct.htm


    Hope that it helps?

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    Quote Originally Posted by melech View Post
    The electron shells in orbit around an atom are designated K,L,M... What do these letters stand for? Who originated these designations? I can't find any reference to its origins in books or the web.
    Another way of looking at it is ....if you slide over the hydrogen box in the periodic table, adjacent to the helium box, you have the energy level diagram....only it's pretty much upside down and backwards left to right. You learn to see the seven pairs of groups ! and 2 as s orbitals filling.....the rows of 10 transition elements as d orbitals filling....the 6 by 5 section of p orbitals near the metal/nonmetal dividing line....and two rows of f electrons filling in the lanthanides and actinides. The symmetry is quite pronounced.

    SEE:http://www.google.com/imgres?imgurl=...iw=737&bih=419
    Last edited by trinitree88; 2011-Apr-11 at 08:44 PM. Reason: links

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