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Shell electrons

  1. Jan 9, 2004 #1
    I can't make sense out of this question.

    Krypton has 36 electrons. How many electrons are in the n = 5 shell?

    It's in the 4th period so why are they asking for the 5th shell?
    The answer is listed as 4 electrons but how?

    2,8,18,8 = 36
    so Kr has 8 in the last shell (n=4)
  2. jcsd
  3. Jan 9, 2004 #2
    4e too is not so formidable coz Kr is in Noble Gas Group so it will have fully filled orbitals.
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