Orbital Energy Levels

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304655635
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Joined: Fri Sep 25, 2015 3:00 am

Orbital Energy Levels

Postby 304655635 » Fri Oct 20, 2017 1:24 pm

Is the 4s orbital's energy higher than that of the 3D orbital?

Abigail Yap 2K
Posts: 51
Joined: Fri Sep 29, 2017 7:07 am

Re: Orbital Energy Levels

Postby Abigail Yap 2K » Fri Oct 20, 2017 4:31 pm

Hello! Yes, the 4s orbital has a higher energy than the 3d orbital.

Christine Wastila 1H
Posts: 61
Joined: Fri Sep 29, 2017 7:04 am

Re: Orbital Energy Levels

Postby Christine Wastila 1H » Fri Oct 20, 2017 6:22 pm

The 4s orbital is lower energy than the 3d orbital for Ca and K because they do not have electrons in the 3d state. However, after the 4s orbital is occupied and electrons enter the 3d state, 3d is then lower energy than 4s. For example, the electron configuration for Scandium is Sc: [Ar] 3d1 4s2.

Zane Mills 1E
Posts: 80
Joined: Fri Sep 25, 2015 3:00 am
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Re: Orbital Energy Levels

Postby Zane Mills 1E » Fri Oct 20, 2017 8:49 pm

^ this is exactly correct. It is important to note when writing the different energy occupied orbitals that the HIGHER energy orbitals are written last, thus the most vulnerable to lose a valence electron.


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