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    the four ammonia molecule forms dative bonds with Cu^2+.
    the copper atom consist of 29 electrons which makes Cu+(28 electron) and Cu 2+ ( 27 electron) . when the electron is 27, there is one valence electron (

    If that's so would'nt there be 9 electrons in the last shell since each ammonia molecule donates 2 electron?

    I'm really confused.
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Updated: November 12, 2015
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