Expanded valence shells

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AlyssaYeh_1B
Posts: 100
Joined: Sat Aug 17, 2019 12:16 am

Expanded valence shells

Postby AlyssaYeh_1B » Sat Oct 26, 2019 7:33 pm

How come P, S, and Cl can accommodate more than 8 valence electrons? I don't understand how they can use d-orbitals to expand their shells

chrisleung-2J
Posts: 112
Joined: Fri Aug 09, 2019 12:17 am
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Re: Expanded valence shells

Postby chrisleung-2J » Sat Oct 26, 2019 8:18 pm

It's not just P, S, and Cl that can exist with expanded valence shells. I believe that any element which has its valence electrons in the 3rd principal level or higher can accommodate more than 8 electrons, as it gains access to d-orbitals which first exist at the 3rd principal level and can be filled to form additional bonds or hold additional lone pairs for atoms of such elements

KaitlynBali_4B
Posts: 51
Joined: Fri Aug 02, 2019 12:16 am

Re: Expanded valence shells

Postby KaitlynBali_4B » Sat Oct 26, 2019 8:38 pm

I also read in the book that the size of the atom is another main factor that determines whether or not an atom can expand its valence shell or not. A potassium atom is capable of having five chlorine atoms bond to it, but a nitrogen atom is much smaller in size and cannot form this many bonds.

SMIYAZAKI_1B
Posts: 63
Joined: Sat Aug 24, 2019 12:15 am

Re: Expanded valence shells

Postby SMIYAZAKI_1B » Mon Oct 28, 2019 8:33 am

When it comes to expanding the shells, it means that the electrons that should've gone to the new shell instead goes to the orbital's d-shell. For example, if the element is 3p5 and they have to accommodate 3 more electrons, they would bring them to 3d shell.


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