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 January 31st, 2017, 11:45 AM #1 Member   Joined: May 2016 From: Ireland Posts: 92 Thanks: 1 copper oxide Could someone explain the bonding of copper oxide to me? What are each element's EC before and after? Last edited by skipjack; January 31st, 2017 at 08:16 PM.
 January 31st, 2017, 08:23 PM #2 Global Moderator   Joined: Dec 2006 Posts: 16,919 Thanks: 1253 Are you referring to Cu$_2$O (which is dark red) or CuO (which is black)?
 February 1st, 2017, 10:25 AM #3 Member   Joined: May 2016 From: Ireland Posts: 92 Thanks: 1 Both. I don't understand either of them. When I am looking at this, should I consider their ECs by 2,8,8,8,8 etc or SPDF way? Do you know what each element's EC is before and after? Last edited by skipjack; February 1st, 2017 at 03:07 PM.
 February 1st, 2017, 03:46 PM #4 Global Moderator   Joined: Dec 2006 Posts: 16,919 Thanks: 1253 For basic understanding, a copper atom has electron counts 2, 8, 18, 1 and donates 1 valence electron in the case of Cu$_2$O or 2 valence electrons in the case of CuO.
 March 21st, 2017, 01:18 PM #5 Member   Joined: May 2016 From: Ireland Posts: 92 Thanks: 1 In cu(1)o i don't understand how copper donates 2 electrons as then it won't have a stable electron configuration
 March 21st, 2017, 03:34 PM #6 Senior Member   Joined: Feb 2016 From: Australia Posts: 1,084 Thanks: 364 Math Focus: Yet to find out. Recall that Cu(I) cation is already short 1 electron. Similarly, Cu(II) is short two electrons.
 March 22nd, 2017, 10:23 AM #7 Member   Joined: May 2016 From: Ireland Posts: 92 Thanks: 1 ok well in the bonding in cu(1)o what is the EC before and after of each atom. i read the cu(1) atom of having 2,8,17 EC. this does not make sense to me Last edited by markosheehan; March 22nd, 2017 at 10:25 AM.

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