Electron Configurations for Chromium and Copper

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Tamera Scott 1G
Posts: 65
Joined: Fri Sep 28, 2018 12:27 am

Electron Configurations for Chromium and Copper

Postby Tamera Scott 1G » Wed Oct 24, 2018 3:06 pm

Could someone explain again why Chromium and Copper have exceptions when it comes to writing their electron configurations? What happens to the electrons?

amogha_koka3I
Posts: 62
Joined: Fri Sep 28, 2018 12:24 am

Re: Electron Configurations for Chromium and Copper

Postby amogha_koka3I » Wed Oct 24, 2018 4:34 pm

So in these cases, I believe a completely full or half full d sub-level is more stable than a partially filled level. So an electron from the 4s orbital is 'excited' and rises to a 3d orbital. For example for copper it goes from 3d9 to 3d10 and the s orbital goes from 4s2 to 4s1. Hope that helps!

Kelsey Warren 1I
Posts: 60
Joined: Fri Sep 28, 2018 12:15 am

Re: Electron Configurations for Chromium and Copper

Postby Kelsey Warren 1I » Wed Oct 24, 2018 5:07 pm

The Cu and Cr are more stable when their electron configurations have a full (or half full) d shell. I think we just need to know these exceptions and what they look like rather than understand exactly why they occur.


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