d-block Exceptions

[Petrina Kan 2I]

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]

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]

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!