How do we know if an element can have an expanded octet?

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Henri_de_Guzman_3L
Posts: 88
Joined: Fri Sep 28, 2018 12:25 am

How do we know if an element can have an expanded octet?

Postby Henri_de_Guzman_3L » Sun Nov 25, 2018 6:13 pm

I know it's period 3 elements and on but why? It's something to do with an available d orbital?

Krisdylle Repollo 4H
Posts: 33
Joined: Fri Sep 28, 2018 12:28 am

Re: How do we know if an element can have an expanded octet?

Postby Krisdylle Repollo 4H » Sun Nov 25, 2018 6:23 pm

Yes, elements in period three and beyond have access to their d-orbitals which allow them to have more than 8 electrons on their valence shell (the d-orbital can hold 10 electrons).

Sydney Stump
Posts: 30
Joined: Fri Sep 28, 2018 12:17 am

Re: How do we know if an element can have an expanded octet?

Postby Sydney Stump » Sun Nov 25, 2018 6:42 pm

The three scenarios that call for a violation of the octet rule are: an odd number of valence electrons, too few valence electrons, and too many valence electrons. The elements that can form the expanded octet have access to a third energy level, d-orbitals, which allows them to break the rule.

WilliamNguyen_4L
Posts: 65
Joined: Fri Sep 28, 2018 12:28 am

Re: How do we know if an element can have an expanded octet?

Postby WilliamNguyen_4L » Sun Nov 25, 2018 7:01 pm

The elements in the third period can have more than 8 electrons because those their atoms have the d orbital its just that it is empty. When they form bonds to have an expanded octet the surplus electrons fill the D orbital.


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