Lewis Structure Exemptions

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Kimberly Bauer 4E
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Lewis Structure Exemptions

Postby Kimberly Bauer 4E » Sun Nov 03, 2019 4:32 pm

Are there any exceptions to the octet rule when drawing Lewis Structures? If so, what are they?

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Re: Lewis Structure Exemptions

Postby FDeCastro_1B » Sun Nov 03, 2019 4:36 pm

Yes, Lewis acids and bases.

Sanjana Munagala_1j
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Re: Lewis Structure Exemptions

Postby Sanjana Munagala_1j » Sun Nov 03, 2019 4:37 pm

Yes there are several exceptions. The first exception is for any elements after Period 3, which could have expanded octets since they have a d-subshell to fill electrons. The other exception are any of the first 5 elements that can have less than an octet. It might be easier to remember that the 4 elements C, N, O, F must have completed octets and there are no exceptions to that.

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