Valence Electrons - Are electrons in the d orbitals considered valence?

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Karishma_1G
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Joined: Fri Sep 28, 2018 12:18 am

Valence Electrons - Are electrons in the d orbitals considered valence?

Postby Karishma_1G » Fri Nov 02, 2018 9:43 pm

Do electrons in d orbitals count as valence electrons? I'm confused because d orbitals are written after the noble gas configuration but they're not the highest energy level (s & p will always be higher). For example how many valence electrons does Manganese (Mn) have and how many valence electrons does Manganese2+ have?

Jovian Cheung 1K
Posts: 48
Joined: Fri Sep 28, 2018 12:16 am

Re: Valence Electrons - Are electrons in the d orbitals considered valence?

Postby Jovian Cheung 1K » Fri Nov 02, 2018 10:22 pm

For s and p block elements, they are not counted. (viewtopic.php?t=417)

For d block elements (which can use their d orbital electrons for bonding), they are counted. (https://socratic.org/questions/how-do-y ... in-an-atom) <- scroll to the bottom where it mentions transition metals and lists Mn as an example

Correct me if I'm wrong :-) Thank you!

Megan_Ervin_1F
Posts: 78
Joined: Fri Sep 28, 2018 12:18 am

Re: Valence Electrons - Are electrons in the d orbitals considered valence?

Postby Megan_Ervin_1F » Sat Nov 03, 2018 3:30 pm

I also was wondering how do you find the valence electrons for elements in the d orbitals?

Jovian Cheung 1K
Posts: 48
Joined: Fri Sep 28, 2018 12:16 am

Re: Valence Electrons - Are electrons in the d orbitals considered valence?

Postby Jovian Cheung 1K » Fri Nov 09, 2018 12:39 pm

Megan_Ervin_1l wrote:I also was wondering how do you find the valence electrons for elements in the d orbitals?


Usually only the electrons in the highest energy level are counted as being valence, but for transition metals, the d-orbital electrons after the previous noble gas configuration count too.

For example, for Fe which has an electron configuration of [Ar]3d64s2, it has 8 valence electrons.

Correct me if I'm wrong, though! That's just my current understanding.

This thread also kind of discusses this:
https://yeahchemistry.com/questions/valence-electron-fe


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