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Elements that break the octet rule

Posted: Tue Dec 04, 2018 11:50 am
by Brianna Brockman 1F
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?

Re: Elements that break the octet rule

Posted: Tue Dec 04, 2018 11:53 am
by Chloe Thorpe 1J
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.

Re: Elements that break the octet rule

Posted: Tue Dec 04, 2018 12:14 pm
by Kessandra Ng 1K
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.

Re: Elements that break the octet rule

Posted: Thu Dec 06, 2018 6:16 pm
by Jack Hewitt 2H
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.

Re: Elements that break the octet rule

Posted: Fri Dec 07, 2018 8:31 pm
by Mark 1D
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

Re: Elements that break the octet rule

Posted: Fri Dec 07, 2018 10:02 pm
by 305117729
Generally, elements with d orbital, e.g. elements in 3rd period, will have expanded octet

Re: Elements that break the octet rule

Posted: Sun Dec 09, 2018 10:33 am
by uhedlund
Elements with a d-orbital may have an expanded octet. This is generally elements in row 3 or lower.