Mo and Ag exceptions

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Chris Tai 1B
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Joined: Sat Aug 24, 2019 12:16 am

Mo and Ag exceptions

Postby Chris Tai 1B » Wed Nov 06, 2019 3:14 pm

Are Molybdenum and Silver also exceptions to filling the 5s shell just like Chromium and Copper are? So would the electron configuration for Mo be [Kr] 4d^5 5s^1 and for Ag be [Kr] 4d^10 5s^1?

Justin Vayakone 1C
Posts: 110
Joined: Sat Sep 07, 2019 12:19 am

Re: Mo and Ag exceptions

Postby Justin Vayakone 1C » Wed Nov 06, 2019 4:39 pm

Yes, Mo and Ag want to have the half filled d-orbital over the full s-orbital, just like Cr and Cu above them.

Micah3J
Posts: 100
Joined: Tue Oct 08, 2019 12:16 am

Re: Mo and Ag exceptions

Postby Micah3J » Wed Nov 06, 2019 4:54 pm

Can someone explain the exceptions to electron configuration again? Thanks

WesleyWu_1C
Posts: 117
Joined: Thu Jul 25, 2019 12:16 am

Re: Mo and Ag exceptions

Postby WesleyWu_1C » Wed Nov 06, 2019 10:28 pm

The two main exceptions to reading the periodic table for the electronic configuration are Chromium and Copper. Chromium will have a lower energy from a half filled d subshell so it's e- configuration is [Ar] 3d^5 4s^1. In addition, copper will have a lower energy with a full d subshell so it's e- configuration will be [Ar] 3d^10 4s^1.

Michelle N - 2C
Posts: 117
Joined: Wed Sep 18, 2019 12:19 am

Re: Mo and Ag exceptions

Postby Michelle N - 2C » Thu Nov 07, 2019 9:30 am

The exceptions are due to the fact that 3d^5 and 3^10 would then make the electron configurations back in order in terms of their principle quantum number. I could be wrong, but I think this would apply to all of the elements that are in that column.


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