Octet Exceptions

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Sophia Dinh 1D
Posts: 100
Joined: Thu Jul 25, 2019 12:15 am

Octet Exceptions

Postby Sophia Dinh 1D » Sun Nov 03, 2019 9:29 pm

Which elements don't follow the octet rule and why?

Sarah Blake-2I
Posts: 153
Joined: Fri Aug 30, 2019 12:16 am

Re: Octet Exceptions

Postby Sarah Blake-2I » Sun Nov 03, 2019 10:05 pm

Elements in period 3 or higher can have an expanded octet due to the inclusion of the d orbital.

Midori Hupfeld 3D
Posts: 55
Joined: Fri Aug 30, 2019 12:17 am

Re: Octet Exceptions

Postby Midori Hupfeld 3D » Sun Nov 03, 2019 10:14 pm

Also Hydrogen and Helium, as well as boron and the rest of column 3 can have incomplete octets. Hydrogen and helium can only hold 2 electrons because they only have an s shell.

Midori Hupfeld 3D
Posts: 55
Joined: Fri Aug 30, 2019 12:17 am

Re: Octet Exceptions

Postby Midori Hupfeld 3D » Sun Nov 03, 2019 10:17 pm

And, we learned that radicals are also an exception to the octet because they have an odd number of electrons (unpaired electrons).

Shrayes Raman
Posts: 129
Joined: Sat Jul 20, 2019 12:15 am

Re: Octet Exceptions

Postby Shrayes Raman » Sun Nov 03, 2019 10:30 pm

P-Block elements in periods or higher have unfilled d sub-shells so they can have expanded octets

Lauren Sanchez 3D
Posts: 52
Joined: Sat Aug 24, 2019 12:17 am

Re: Octet Exceptions

Postby Lauren Sanchez 3D » Sun Nov 03, 2019 11:05 pm

Midori Hupfeld 3D wrote:And, we learned that radicals are also an exception to the octet because they have an odd number of electrons (unpaired electrons).

Does this mean that radicals are more reactive then?

JohannaPerezH2F
Posts: 94
Joined: Wed Sep 18, 2019 12:18 am

Re: Octet Exceptions

Postby JohannaPerezH2F » Sun Nov 03, 2019 11:07 pm

the octet rule is strictly followed by B row and as you go down not that much, an example would be PBr5

quresh3E
Posts: 36
Joined: Wed Sep 18, 2019 12:17 am

Re: Octet Exceptions

Postby quresh3E » Sun Nov 03, 2019 11:46 pm

Expanded Octet- 3rd row and bellow.
Incomplete Octet- First 5 elements and column under Al.


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