d-block Exceptions

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Petrina Kan 2I
Posts: 102
Joined: Fri Aug 30, 2019 12:17 am

d-block Exceptions

Postby Petrina Kan 2I » Sun Oct 27, 2019 11:24 pm

Are the only exceptions for the d5 and d10 rule Chromium, Copper, Molybdenum, and Silver? Or does it go to the periods below that too in the same group? (I know that Tungsten does not follow this rule, however.)

Julie_Reyes1B
Posts: 105
Joined: Sat Jul 20, 2019 12:16 am

Re: d-block Exceptions

Postby Julie_Reyes1B » Sun Oct 27, 2019 11:42 pm

Hi!
I believe the d5 and d10 exceptions apply to any element whose electron configuration would be lower energy with a half-filled or filled d-orbital rather than a filled s-orbital. I think for the purposes of this class, we are only responsible for chromium and copper.
Hope this helps!

Alice Chang 2H
Posts: 101
Joined: Fri Aug 30, 2019 12:18 am

Re: d-block Exceptions

Postby Alice Chang 2H » Sun Oct 27, 2019 11:53 pm

Hey I found this answer here at https://www.brightstorm.com/science/chemistry/the-atom/exceptions-to-electron-configuration/ :
There are two main exceptions to electron configuration: chromium and copper. In these cases, a completely full or half full d sub-level is more stable than a partially filled d sub-level, so an electron from the 4s orbital is excited and rises to a 3d orbital.

Hope it helps!


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