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Principal Quantum Number

  1. Oct 25, 2006 #1
    Could someone please help me firgure out this homework problem?

    "What is the principal quantum number of the s and p valence electrons in sulfur and arsenic?"
  2. jcsd
  3. Oct 25, 2006 #2
    Google "quantum numbers and electron configurations".

    That should provide you with much info.

    Best of luck.

  4. Oct 25, 2006 #3


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    Staff Emeritus
    Science Advisor

    This is a rather basic homework problem of which the basis should be in one's text book. Certainly one should know the significance of the principal quantum number and how it relates to the periodic table.


    Look for the electron configurations, as Smith4046 mentioned.
  5. Oct 25, 2006 #4
    Ok great I got it now. Thanks. :)
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