Configuration of 3d and 4s orbitals

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Michelle Shin 4B
Posts: 50
Joined: Thu Jul 25, 2019 12:17 am

Configuration of 3d and 4s orbitals

Postby Michelle Shin 4B » Sun Oct 20, 2019 6:08 pm

Why is the electron configuration of scandium [Ar] 3d^1 4s^2 and not [Ar] 4s^2 3d^1 ?

Matt F
Posts: 100
Joined: Sat Aug 17, 2019 12:17 am

Re: Configuration of 3d and 4s orbitals

Postby Matt F » Sun Oct 20, 2019 6:13 pm

I think Dr. Lavelle explained in class that 4s is written after 3d since 3d has lower energy than 4s. Typically the orbitals are listed in ascending order of energy


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