Adding electrons for exceptions

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Vivian Wang 3J
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Joined: Wed Sep 21, 2016 2:57 pm
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Adding electrons for exceptions

Postby Vivian Wang 3J » Fri Oct 28, 2016 11:21 am

What would Cu2- look like?

Electron configuration of Cu: [Ar]3d104s1

MichelleCarter_1F
Posts: 16
Joined: Wed Sep 21, 2016 2:59 pm

Re: Adding electrons for exceptions

Postby MichelleCarter_1F » Fri Oct 28, 2016 12:36 pm

Hello!
Here is the electron configuration of Cu: [Ar] 3d10 4s1. Then, the ion has a 2+ charge so two electrons are removed. One is taken from the
4s sub-shell, the other from the 3d sub-shell.
So the electron configuration of Cu2+ is: 1s2 2s2 2p6 3s2 3p6 3d9. The noble gas electron configuration is [Ar] 3d9.

Amy_Shao_2D
Posts: 22
Joined: Fri Jul 15, 2016 3:00 am

Re: Adding electrons for exceptions

Postby Amy_Shao_2D » Sat Oct 29, 2016 9:11 pm

I have the same question; it makes sense for Cu2+ but then for Cu2- you're adding two electrons, so would it go into the p orbital and be 3d10 4s2 4p1? Or is it even possible to have Cu2-?

Vivian Wang 3J
Posts: 29
Joined: Wed Sep 21, 2016 2:57 pm
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Re: Adding electrons for exceptions

Postby Vivian Wang 3J » Mon Oct 31, 2016 1:39 pm

MichelleCarter_1C wrote:Hello!
Here is the electron configuration of Cu: [Ar] 3d10 4s1. Then, the ion has a 2+ charge so two electrons are removed. One is taken from the
4s sub-shell, the other from the 3d sub-shell.
So the electron configuration of Cu2+ is: 1s2 2s2 2p6 3s2 3p6 3d9. The noble gas electron configuration is [Ar] 3d9.


Hello!
I asked about Cu2-, not Cu2+

Actually, I am more interested in knowing the electron configuration for Cr- or Cr2-.

Chromium configuration: [Ar]3d54s1

Thanks.


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