Octet Exception

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Katherine Brenner 3H
Posts: 73
Joined: Wed Sep 18, 2019 12:18 am

Octet Exception

Postby Katherine Brenner 3H » Fri Nov 01, 2019 3:23 pm

What elements are an exception to the octet rule?

Adrianh72
Posts: 48
Joined: Sat Aug 17, 2019 12:16 am

Re: Octet Exception

Postby Adrianh72 » Fri Nov 01, 2019 3:37 pm

Main group elements in period 3 and downward, radicals, and elements in a molecule with an odd number of electrons can all break the octet rule.

BNgo_2L
Posts: 95
Joined: Wed Sep 11, 2019 12:17 am

Re: Octet Exception

Postby BNgo_2L » Fri Nov 01, 2019 9:39 pm

Elements with expanded electron shells (with electrons more than s2p6), lewis acids and bases, Group 13 elements, and radicals (compounds with unpaired electrons) are all exceptions to the octet rule.

Nick Fiorentino 1E
Posts: 102
Joined: Wed Sep 18, 2019 12:16 am

Re: Octet Exception

Postby Nick Fiorentino 1E » Sat Nov 02, 2019 9:06 am

The elements in period three and the subsequent periods along with the column 13 elements are exceptions to the octet rule

AniP_2D
Posts: 95
Joined: Sat Aug 17, 2019 12:17 am

Re: Octet Exception

Postby AniP_2D » Sat Nov 02, 2019 10:15 am

Any element past Phosphorus (including P) are an exception to the octet rule and can hold more than 8 electrons.

Joowon Seo 3A
Posts: 100
Joined: Sat Aug 24, 2019 12:17 am
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Re: Octet Exception

Postby Joowon Seo 3A » Sat Nov 02, 2019 1:07 pm

B and Al are also exceptions to this rule, as they must get 5 e- to get to an octet. However, since that is too many electrons they usually get 3 more e-


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