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Homework Help: Orbital Blocks and Energy Levels

  1. Jun 16, 2011 #1


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    Gold Member

    Ok, I know that the S, P, D, and F represent blocks (groups of elements) on the periodic table.

    I know that the numbers represent rows on the periodic table.

    But what about the arrows? What's with the business of "increasing energy"? Why are the arrows slanted?

    [PLAIN]http://i.min.us/icVeTS.png [Broken]
    Last edited by a moderator: May 5, 2017
  2. jcsd
  3. Jun 16, 2011 #2
    Last edited by a moderator: May 5, 2017
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