Electron Configuration and Unfilled Orbitals

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Jessica Chen 1F
Posts: 61
Joined: Fri Sep 28, 2018 12:17 am

Electron Configuration and Unfilled Orbitals

Postby Jessica Chen 1F » Fri Oct 26, 2018 12:01 am

Given that an Au atom (gold) has an electron configuration of [Xe] 5d9, 6s2, does that mean the 6s subshell would start to be filled before the 5d subshell was completely filled? Is that possible and why?

Brian Chhoy 4I
Posts: 66
Joined: Fri Sep 28, 2018 12:16 am

Re: Electron Configuration and Unfilled Orbitals

Postby Brian Chhoy 4I » Fri Oct 26, 2018 12:21 am

Yes the 6s orbital would begin to fill before the 5d orbital because it has a lower energy than that of the 5d orbital. Keep in mind that lower energy orbitals always fill up before higher orbitals. If you need more clarification: https://www.chemguide.co.uk/atoms/prope ... oblem.html

MadisonB
Posts: 63
Joined: Fri Sep 28, 2018 12:19 am

Re: Electron Configuration and Unfilled Orbitals

Postby MadisonB » Fri Oct 26, 2018 1:53 am

Another explanation for this is that the most balanced state might not be the one that goes in order with the set rules. Lower energy fills before higher energy, and the most balanced state is strived for as well.


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