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Rohan Kubba Dis 4B
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Postby Rohan Kubba Dis 4B » Sat Oct 19, 2019 7:10 pm

Can someone please explain the exceptions to the multi-electron atoms? If someone could use some examples and explanations to describe these special cases, it would be much appreciated.

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Joined: Thu Jul 25, 2019 12:17 am

Re: Exceptions

Postby nickianel_4b » Sat Oct 19, 2019 8:31 pm

The exceptions are when electrons move from the 4s orbital to a 3d orbital. I think this is just because it's more stable for the atom to have all half-full or full 3d orbitals than for them to be uneven. The examples Dr. Lavelle used in class are
Cr: [Ar] 3d5 4s1 instead of [Ar] 3d4 4s2
Cu: [Ar] 3d10 4s1 instead of [Ar] 3d9 4s2

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Re: Exceptions

Postby ranqiao1e » Fri Oct 25, 2019 6:45 pm

In order to be more stable, some electrons in certain atoms may not follow the rule. Remember that they want to be as "happy" as possible.

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