Exceptions  [ENDORSED]

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danielruiz1G
Posts: 62
Joined: Fri Apr 06, 2018 11:04 am

Exceptions

Postby danielruiz1G » Sun May 13, 2018 11:24 pm

So I know that there are exceptions for chromium and copper when doing electron configurations, but does anyone know exactly why this happens? My first thought is that it takes away an electron from another orbital, is this close to being correct?

Jazmin 1H
Posts: 25
Joined: Fri Apr 06, 2018 11:01 am

Re: Exceptions

Postby Jazmin 1H » Sun May 13, 2018 11:34 pm

I am confused as to why there are exceptions for these elements as well. I would appreciate if someone explained this!

LilianKhosravi_1H
Posts: 32
Joined: Fri Apr 06, 2018 11:03 am

Re: Exceptions

Postby LilianKhosravi_1H » Sun May 13, 2018 11:39 pm

I think it's because a half full and full orbital are more stable than partially filled d orbital so the electron from 4s goes to 3d.

FizaBaloch1J
Posts: 41
Joined: Fri Apr 06, 2018 11:01 am

Re: Exceptions  [ENDORSED]

Postby FizaBaloch1J » Mon May 14, 2018 12:05 pm

Exactly what the above comment said. Half full and full shells are more stable than ones that are not. Thus, Cr and Cu since they are one away from being half full or full, we go ahead and put their d shell as 3d5 and 3d10 and then take away an electron from their 4s2 to make it 4s1.


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