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Valence electrons

  1. Oct 3, 2013 #1
    Copper has one valence electron, but it can lose more than one when forming cupric compounds. I had thought it could only lose the valence electron. How can this happen?

    If this is true, how does an electron from the d orbital jump to a higher orbital if only valence electrons can make the jump?
  2. jcsd
  3. Oct 4, 2013 #2
    The general electronic configuration of 3d elements is 3d1-104s1-2. As one moves gradually along the group the electrons get filled to the 3d orbitals. So by that condition copper should have the electronic configuration as 3d94s2. But since completely filled orbitals are more stable an electron jumps back to 3d, giving the configuration as 3d104s1. So one of the electrons in 3d orbital is the valence electron itself. Thats the reason why all those happen...
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