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Homework Help: Electron configuration notation

  1. May 5, 2008 #1
    right in full notation, and core

    Ca 2+ =
    1s2 2s2 2p6 3s2 3p4

    Ca 2+ = [Ar] 4s2 - what happens when the 4s2 cancells out?
  2. jcsd
  3. May 6, 2008 #2


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    Your full notation is wrong.

    I'm not quite certain what your second question is in regards to.
  4. May 6, 2008 #3
    Ca = [Ar] 4s2

    If you have the element S2- you're electron configuration will be [Ar], while the element S is just [Ne] 3s2 3p4.
  5. May 6, 2008 #4
    hmm. thats the thing, the positive ion throws me off.... im supposed to remove 2 electrons in this order P -> S -> D so originally i would have 2+ more on the last shell

    Second question im supposed to write in Core Notation.
  6. May 6, 2008 #5


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    Your supposed to remove the electron from the highest occupied electron orbital which is the 4s2 orbital - what would you have as a result?

    Core notation refers to the noble gas notation - it's nothing complicated once you figure out the first part the second should be made apparent.
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