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Exited states configuration

  1. Nov 1, 2009 #1
    Litium has a structure

    [tex]1s^22s^1[/tex]

    What is the first exited state of litium?


    I have some doubt? I think that it is

    [tex]1s^22p^1[/tex]

    Is it correct or maybe

    [tex]1s^23p^1[/tex]

    Why I'm in problem. Because wave function of hydrogen atom depends of three quantum numbers
    [tex]\psi_{n,l,m}[/tex] but energy depends only of one quantum number [tex]E_n[/tex]. So we have degeneration. In this logic it's need to be [tex]1s^23p^1[/tex]. But I don't have hydrogen I have litium, so must be some ecranisation and of course Hund rule [tex]s[/tex] and [tex]p[/tex] orbitals have different energy. And I can say that

    [tex]E_{n,l}=-13,6eV\frac{1}{(n-\Delta l)^2}[/tex]

    Thanks for your answer!
     
  2. jcsd
  3. Nov 1, 2009 #2
  4. Nov 3, 2009 #3
    Thanks!
     
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