Electron Configurations

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Electron Configurations

Postby EthanPham_1G » Thu Oct 24, 2019 11:12 pm

Do we have to write 4s after 3d in electron configurations? And why is the energy of the 3d orbital less than the 4s orbital only if it is partially filled?

Andrew Liang 1I
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Re: Electron Configurations

Postby Andrew Liang 1I » Thu Oct 24, 2019 11:41 pm

Yes with Dr. Lavelle we do need to write 3d before 4s because 3d actually comes before 4s in electron configuration. 3d is in 3rd principle energy level and 4s is in 4th principle energy level. I'm not too sure about the second part of the question.

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Re: Electron Configurations

Postby Cassandra_1K » Fri Oct 25, 2019 1:32 am

How do we know whether to remove 3d or 4s?

Deepika Reddy 1A
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Re: Electron Configurations

Postby Deepika Reddy 1A » Fri Oct 25, 2019 8:19 am

You always remove 4s electrons first before 3d because the 4s has electrons that are on the outer shell, so these electrons are lost first.

chari_maya 3B
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Re: Electron Configurations

Postby chari_maya 3B » Fri Oct 25, 2019 8:20 pm

In what scenario would a valence configuration be used over an electron configuration?

Alexa Hernandez 3k
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Re: Electron Configurations

Postby Alexa Hernandez 3k » Fri Oct 25, 2019 8:30 pm

4s is written after 3d if this level appears in the configuration. It was experimentally proven that 4s has a lower energy level then 3d

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