Electron configuration of electrons

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Vivian Wang 3J
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Joined: Wed Sep 21, 2016 2:57 pm
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Electron configuration of electrons

Postby Vivian Wang 3J » Fri Oct 14, 2016 2:38 pm

Chromium, Cr
[Ar] 3d5 4s1

Copper, Cu
[Ar] 3d10 4s1

When these two lose electrons, would they be removed from the 3d subshell or 4s subshell?

For example: Cr2+
Would become: [Ar] 3d3 4s1 ?
OR [Ar] 3d4 ?

Mizuno_Mikaela_1D
Posts: 29
Joined: Wed Sep 21, 2016 3:00 pm

Re: Electron configuration of electrons

Postby Mizuno_Mikaela_1D » Fri Oct 14, 2016 4:38 pm

When these two lose electrons, they will be removed from the 4s subshell because for cations, the outermost e- is removed. In this case, since Chromium, Cr is [Ar] 3d5 4s1 and Copper, Cu is [Ar] 3d10 4s1, the 4s1 electron is removed because it is in the outermost electron shell. So...

Cu+ would become: [Ar] 3d10
Cr2+ would become: [Ar] 3d4

Here is a youtube video:
https://www.youtube.com/watch?v=CXK23OORXZ4

JELCI_BARRAZA_1C
Posts: 17
Joined: Wed Sep 21, 2016 3:00 pm

electron configuration

Postby JELCI_BARRAZA_1C » Fri Oct 14, 2016 4:49 pm

why is electron configuration important in chemistry?


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