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Homework Help: Valence electron

  1. Mar 1, 2008 #1
    1. The problem statement, all variables and given/known data


    calculate how many valence electrons there are in a 1cm3 crystal of silicon?
    2. Relevant equations



    3. The attempt at a solution

    the outer shell of si element has 4 electrons, i think this is my answer
     
  2. jcsd
  3. Mar 1, 2008 #2
    No I think you need to know the density of Si, and calculate mass. Convert mass in grams to avagadros number. Each atom has a valence shell.
     
  4. Mar 1, 2008 #3
    every atom does have a valence shell but some are stable gases. careful with the numbers. try using a periodic table to ensure your answer and rmb 1cm3 is 1cm x 1cm x 1cm. dont just x3 it. many people make these mistakes
     
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