jim, i am sorry to get your hopes up that i know this answer. i have no clue. what grade r u in?
Cu is 1s2 2s2 2p6 3s2 3p6 3d10 4s1 Remove ther 4s1 and 1 of the d to make 3d9 to arrive at Cu^+2. http://www.webelements.com/copper/atoms.html
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