Cerium

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JennyZhu1K
Posts: 101
Joined: Fri Sep 24, 2021 7:12 am

Cerium

Postby JennyZhu1K » Sun Oct 24, 2021 10:06 pm

I know that Professor Lavelle said not to worry too much about f-orbitals, but I was wondering why Cerium's electron configuration is [Xe]4f1 5d1 6s2 instead of [Xe] 4f2 6s2?
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Paul Zhang 2F
Posts: 55
Joined: Fri Sep 24, 2021 7:35 am
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Re: Cerium

Postby Paul Zhang 2F » Sun Oct 24, 2021 10:20 pm

Hello! Like chromium and copper, the electron config of cerium is an exception to Madelung's rule, which doesn't apply very well to atoms with high atomic numbers (https://www.thoughtco.com/definition-of ... ule-605325). Hope that's helpful!
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Alan Nguyen 2I
Posts: 100
Joined: Fri Sep 24, 2021 6:43 am

Re: Cerium

Postby Alan Nguyen 2I » Mon Oct 25, 2021 12:11 am

Could someone go into more depth about why these exceptions exist in nature?
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