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Max # of electrons in an atom whose highest-energy electrons have n=5

  1. Oct 15, 2009 #1
    What is the maximum number of electrons in an atom whose highest-energy electrons have the principal quantum number ?

    I tried 54 and 110. Neither was correct.
     
  2. jcsd
  3. Oct 15, 2009 #2
    Probably yes, but is the atom in its ground state?

    What are the subshells in the n=5 shell? Which element has the highest atomic number in those subshells?
     
  4. Oct 18, 2009 #3
    The first sentence I posted is everything given in the problem. I'm assuming it's in a ground state but I'm not sure.
     
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