Electron configuration
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Jada Dawson
- Posts: 100
- Joined: Fri Sep 24, 2021 5:37 am
Electron configuration
Can someone explain to me why the right notation for electron configuration is to put 3d before 4s, even though the 4s orbital is filled first since it has a lower energy level?
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Allison Peng 1D
- Posts: 152
- Joined: Fri Sep 24, 2021 6:19 am
Re: Electron configuration
After the 4s orbital is filled, the 3d now has lower energy than the 4s one (thus electrons now fill into the 3d, and 3d is now listed first). Prof Lavelle had a good diagram for it, I didn't take a picture but maybe someone else has it.
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