Exceptions to the Configuration Rules

Moderators: Chem_Mod, Chem_Admin

Ryan Neis 2L
Posts: 53
Joined: Fri Sep 29, 2017 7:04 am

Exceptions to the Configuration Rules

Postby Ryan Neis 2L » Wed Nov 01, 2017 3:45 pm

Can someone clarify why there are certain exceptions to the rules of electron configuration when dealing with elements such as Copper and Chromium?

Alex Leve 3F
Posts: 20
Joined: Fri Sep 29, 2017 7:07 am

Re: Exceptions to the Configuration Rules

Postby Alex Leve 3F » Wed Nov 01, 2017 3:53 pm

Copper and chromium are most stable when they have either half filled or fully filled d-orbitals. In the case of chromium, you take away one of the s-orbital electrons so that the element can have a half filled d-orbital ([Ar] 3d5 4s1). With copper, you take away one of the s-orbital electrons so that the element can have a fully filled d-orbital ([Ar] 3d10 4s1).

Hope this helps!

MichelleKaku1H
Posts: 21
Joined: Fri Sep 29, 2017 7:04 am

Re: Exceptions to the Configuration Rules

Postby MichelleKaku1H » Thu Nov 02, 2017 12:12 am

Just to make sure, there are no other exceptions to the rules that we need to know right? It's just copper and chromium?

Kamryn Chang 1I
Posts: 20
Joined: Fri Sep 29, 2017 7:04 am

Re: Exceptions to the Configuration Rules

Postby Kamryn Chang 1I » Thu Nov 02, 2017 12:31 am

For electron configurations, I'm pretty sure copper and chromium are the only two exceptions that we need to know :) However, the elements below copper and chromium also follow the same trend, such as silver, so I would keep an eye out for those too!


Return to “Electron Configurations for Multi-Electron Atoms”

Who is online

Users browsing this forum: No registered users and 1 guest