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Expanded Valence Shells

Posted: Fri Nov 01, 2019 1:27 pm
by MaryBanh_2K
When we do Lewis Dot Diagrams, how do we know which atoms can have expanded valence shells? Also, if they are able to expand their valence shells, how many extra valence electrons are they able to possess?

Re: Expanded Valence Shells

Posted: Fri Nov 01, 2019 1:31 pm
by Hannah Romano 4D
Atoms with empty spaces in the d-orbitals can expand their valence shells.

Re: Expanded Valence Shells

Posted: Fri Nov 01, 2019 2:11 pm
by 405335722
it depends on how many empty d or p orbitals there are to determine how many times it can expand an octet.

I dont think it is only empty d orbitals because sulfur can become an expanded octet and it deosnt have an empty d orbital only a p orbital to "tap into"

Re: Expanded Valence Shells

Posted: Fri Nov 01, 2019 5:12 pm
by Julia Mazzucato 4D
If I'm correctly remembering this, any element in period 3 and beyond can have an expanded valence shell. I don't think there is a limit to how expanded the valence shell can be, but generally, most compounds don't really go past 12-ish VE in their Lewis Dot Structure.

Re: Expanded Valence Shells

Posted: Fri Nov 01, 2019 6:53 pm
by Alex Hitti 3E
If an atom has an incomplete d and 3(+)p orbital(s) in period 3 and down, they can have an expanded valence shell. In the Lewis dot diagram, the number of electrons do not really go past 12, which fortunately helps for space & convenience's sake.