Electron Configurations

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105114680
Posts: 60
Joined: Fri Sep 28, 2018 12:23 am

Electron Configurations

Postby 105114680 » Tue Oct 23, 2018 8:31 pm

In class, Dr. Lavelle mentioned that Copper and Chromium are strange exceptions and they fill up (or half fill up) their d-subshell before the s-subshell because that is the configuration with the lowest energy. I was wondering if this also applies to Ag and Mo as well? Thank you!

Danielle_Gallandt3I
Posts: 70
Joined: Fri Sep 28, 2018 12:24 am

Re: Electron Configurations

Postby Danielle_Gallandt3I » Tue Oct 23, 2018 8:44 pm

Yes, the same rule applies to those elements as well. The Mo configuration is 4d^5 5s^1 and the Ag configuration is 4d^10 5s^1. I would recommend that you look at a Periodic Table that provides the electron configuration (such as the one in our textbook) because those are not the only two that have surprising configurations in that row.

timschaeffer Dis 1J
Posts: 38
Joined: Fri Sep 28, 2018 12:18 am

Re: Electron Configurations

Postby timschaeffer Dis 1J » Tue Oct 23, 2018 8:45 pm

It looks like the same exception applies for Mo but not for Ag (according to the periodic table in the front of the Chemical Principles book). I don't have a good explanation as to why this is.


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