Octet Exception

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Wilson 2E
Posts: 100
Joined: Sat Aug 17, 2019 12:18 am

Octet Exception

Postby Wilson 2E » Sun Nov 10, 2019 1:00 pm

Is the expansion of the octet rule limited only to an element's d-block, or can the f-block store electrons too? Any examples of this happening?

Ariana Iranmahboub1G
Posts: 114
Joined: Fri Aug 09, 2019 12:17 am

Re: Octet Exception

Postby Ariana Iranmahboub1G » Sun Nov 10, 2019 1:04 pm

I believe the f-block can also have an expanded octet rule because any element in the 3rd period or below can have an extended octet and all elements with an f block are below the 3rd period.

rabiasumar2E
Posts: 108
Joined: Thu Jul 11, 2019 12:15 am

Re: Octet Exception

Postby rabiasumar2E » Sun Nov 10, 2019 1:10 pm

Any element in and after the third period can have an expanded octet due to them having more than just p-orbitals.

Betania Hernandez 2E
Posts: 107
Joined: Fri Aug 02, 2019 12:15 am

Re: Octet Exception

Postby Betania Hernandez 2E » Sun Nov 10, 2019 2:17 pm

Any element below and including the 3rd period is able to have expanded octet. The first two periods cannot have expanded octets because they only go up to the p block.

Matt F
Posts: 100
Joined: Sat Aug 17, 2019 12:17 am

Re: Octet Exception

Postby Matt F » Sun Nov 10, 2019 3:20 pm

From my understanding, you really only have to worry about the octet rule with 2nd period elements (mainly N, O, F). As others mentioned, once you reach 3rd period elements, d-orbitals can accommodate extra electrons.

gferg21
Posts: 51
Joined: Sat Aug 17, 2019 12:17 am

Re: Octet Exception

Postby gferg21 » Sun Nov 10, 2019 3:36 pm

The octet rule is really only applicable to atoms in the s-orbital or in the periods 1 or 2. After the d-orbital is introduced, the expanded octet rule is applicable.

BCaballero_4F
Posts: 94
Joined: Wed Nov 14, 2018 12:22 am

Re: Octet Exception

Postby BCaballero_4F » Sun Nov 10, 2019 4:40 pm

I believe the f-block can store electrons too since the octet exception applies to those after the third period.

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

Re: Octet Exception

Postby Katherine Brenner 3H » Fri Nov 15, 2019 7:53 pm

There is a couple exceptions including some with an expanded octet like Phosphorus and Sulfur. Also other elements have a smaller octect like Hydrogen.

Osvaldo SanchezF -1H
Posts: 122
Joined: Wed Sep 18, 2019 12:21 am

Re: Octet Exception

Postby Osvaldo SanchezF -1H » Fri Nov 15, 2019 9:57 pm

Basically anything below period 2 can have an expanded octet, due to their capability of being able to hold more electrons in their D-orbitals or F-orbitals. Hope this helps.


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