Exceptions to the Octet Rule

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Nicole Filbert 1D
Posts: 24
Joined: Fri Sep 25, 2015 3:00 am

Exceptions to the Octet Rule

Postby Nicole Filbert 1D » Thu Oct 15, 2015 2:24 pm

So I know that H, Li,and Be are exceptions to the octet rule but is He also?
The first lecture we began discussing lewis structures I remember Lavelle saying "H, He, Li,and Be," but the course reader only says three? Then two lectures later, he said it again... so yea? is He considered an exception also? or no because its already in group 18 where the valence electrons have already reached an octet?

Erin Murashige 1L
Posts: 25
Joined: Fri Sep 25, 2015 3:00 am

Re: Exceptions to the Octet Rule

Postby Erin Murashige 1L » Thu Oct 15, 2015 3:09 pm

I think that helium is still considered to be an exception to the octet rule along with the other elements.

SubparChemist
Posts: 27
Joined: Fri Sep 25, 2015 3:00 am

Re: Exceptions to the Octet Rule

Postby SubparChemist » Thu Oct 15, 2015 6:34 pm

Yes, it's an exception to the octet rule because of its comfortability with just two electrons fulfilling its shell.

But like Erin I believe there's a few others not mentioned, I'm not sure what they are though, sorry.


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