Elements that break the octet rule

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Brianna Brockman 1F
Posts: 60
Joined: Fri Sep 28, 2018 12:23 am

Elements that break the octet rule

Postby Brianna Brockman 1F » Tue Dec 04, 2018 11:50 am

So I know that Br, I, and P can break the octet rule in lewis structures, but I read that there are other elements that can do this too, like Cl occasionally. Which elements are we required to know that break the octet rule for this class?

Chloe Thorpe 1J
Posts: 77
Joined: Fri Sep 28, 2018 12:16 am

Re: Elements that break the octet rule

Postby Chloe Thorpe 1J » Tue Dec 04, 2018 11:53 am

I think H, He, Li, Be, and anything in group 13 can have an incomplete octet. Any element in row 3 or below can have an expanded octet because of the d-orbital.

Kessandra Ng 1K
Posts: 67
Joined: Fri Sep 28, 2018 12:25 am

Re: Elements that break the octet rule

Postby Kessandra Ng 1K » Tue Dec 04, 2018 12:14 pm

Just remember that if the element can have access to the d-orbital, then it will be able to have an expanded octet as electrons can 'go' into that orbital.

Jack Hewitt 2H
Posts: 67
Joined: Fri Sep 28, 2018 12:27 am

Re: Elements that break the octet rule

Postby Jack Hewitt 2H » Thu Dec 06, 2018 6:16 pm

Brianna Brockman 3C wrote:So I know that Br, I, and P can break the octet rule in lewis structures, but I read that there are other elements that can do this too, like Cl occasionally. Which elements are we required to know that break the octet rule for this class?

It is better to think of it conceptually that if an element has access to a d-orbital it can have an expanded octet rather than trying to memorize specific elements.

Mark 1D
Posts: 63
Joined: Fri Sep 28, 2018 12:18 am

Re: Elements that break the octet rule

Postby Mark 1D » Fri Dec 07, 2018 8:31 pm

The elements in the d block can violate the octet rule because of the presence of the d orbital into which more electrons can reside

305117729
Posts: 30
Joined: Fri Sep 28, 2018 12:16 am

Re: Elements that break the octet rule

Postby 305117729 » Fri Dec 07, 2018 10:02 pm

Generally, elements with d orbital, e.g. elements in 3rd period, will have expanded octet

uhedlund
Posts: 38
Joined: Wed Nov 15, 2017 3:03 am

Re: Elements that break the octet rule

Postby uhedlund » Sun Dec 09, 2018 10:33 am

Elements with a d-orbital may have an expanded octet. This is generally elements in row 3 or lower.


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