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How do you determine the valence energy level when looking at a periodic table?

  1. Oct 18, 2009 #1
    How do you know how many valence energy level you have by just looking at the periodic table?
    because you know that the group number tells the valence electrons right. :)
    so what about valence energy level? :D
     
  2. jcsd
  3. Nov 10, 2009 #2
    Well, a valence energy level is the number of shells present, and if you know how many electrons are in each valence shell, you can determine the amount of shells there are.
     
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