octet exceptions

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Kristy 1F
Posts: 31
Joined: Fri Sep 28, 2018 12:19 am

octet exceptions

Postby Kristy 1F » Fri Nov 02, 2018 2:20 am

Is there any reason for the octet exceptions that elements in 13th column don’t have to complete octet?

Posts: 56
Joined: Fri Sep 28, 2018 12:25 am

Re: octet exceptions

Postby julia_lok_2K » Fri Nov 02, 2018 9:27 am

I don't think the textbook explains this exception, and I tried looking it up on other websites as well but they didn't really explain it either, and Lavelle didn't give a reason too. So my guess is that you only have to memorize this exception and won't have to explain this trend on the exam.

Sorry if this wasn't much help to you

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

Re: octet exceptions

Postby zoepamonag4C » Fri Nov 02, 2018 8:04 pm

I think that it's because elements (ex:Cl, S, etc) that are able to have expanded octets can use the 3d subshell.

Posts: 30
Joined: Fri Sep 28, 2018 12:26 am

Re: octet exceptions

Postby daisyjimenezt » Sat Nov 10, 2018 11:15 pm

they can have d states which allows for an expanded octet

Alexandra Ortega 4D
Posts: 31
Joined: Wed Oct 03, 2018 12:17 am

Re: octet exceptions

Postby Alexandra Ortega 4D » Sun Nov 11, 2018 10:34 pm

Elements in the 13th column do not form octets because they are simply more stable with less than 8 valence electrons, such as boron which only forms 3 bonds. Boron only has 3 valence electrons to begin with, so it does not have enough electrons to form more than 3 covalent bonds.

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