Electron Configuration of Silver

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Bailey Giovanoli 1L
Posts: 109
Joined: Wed Sep 30, 2020 9:50 pm

Electron Configuration of Silver

Postby Bailey Giovanoli 1L » Sat Oct 31, 2020 5:35 pm

I was under the impression that the in the filling order for orbitals, 5s comes before 4d. Therefore, I would assume the electron configuration of Silver to be:
Ag: [Kr] 4d^9, 5s^2
However, the solution manual has it as [Kr] 4d^10, 5s^1.
Am I wrong and the 5s actually fills before the 4d shell or is Silver's configuration abnormal for some reason? Could someone please explain this to me?

Mohamed Mido
Posts: 126
Joined: Wed Sep 30, 2020 9:33 pm

Re: Electron Configuration of Silver

Postby Mohamed Mido » Sat Oct 31, 2020 5:56 pm

The d orbital is filled before the s orbital because the electron is going to fill up the orbital with the lower energy and one that is more stable. It won't always be the s orbital that is lower energy and more stable. Sometimes the d orbital must be filled completely and then the s orbital starts to get filled up.

Samantha Low 3D
Posts: 97
Joined: Wed Sep 30, 2020 10:04 pm

Re: Electron Configuration of Silver

Postby Samantha Low 3D » Sat Oct 31, 2020 10:38 pm

Thank you for posting! I always get confused on how the energy orbitals fill up, so I started using this chart. Hope this helps!

Jordan Tatang 3L
Posts: 114
Joined: Wed Sep 30, 2020 9:31 pm
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Re: Electron Configuration of Silver

Postby Jordan Tatang 3L » Sat Oct 31, 2020 11:55 pm

Hi! So you're correct in that you the 5s orbital would get filled prior to the 4d orbitals. However, silver's electron configuration is an exception similar to copper. The 4d orbital is much more stable with 10 electrons instead of 9 so it takes one of the electrons from the 5s orbital.

Hopefully that helps answer your question.

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