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Transition metal oxidation states

  1. Jul 12, 2010 #1

    Why does Ni only form NiO with oxidation state of +2 whereas the other transition metals form a wide range of oxides with variable oxidation states

  2. jcsd
  3. Jul 13, 2010 #2


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    Science Advisor

    It behaves the same way as do Zn and Copper which are its neighbours.
    The reason is that the d-electrons shield each other only badly from the nuclear charge. Hence the effective nuclear charge increases (Google for Slater rules) when the number of d-electrons increases and the energy of the d-electrons relative to the valence s-electrons drops when going in the period from left to right so that they participate no longer in bonding at the end of the period.
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