Expanded Octet

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Jose Robles 1D
Posts: 100
Joined: Fri Aug 02, 2019 12:15 am

Expanded Octet

Postby Jose Robles 1D » Wed Nov 06, 2019 3:19 pm

Why and how are some elements allowed to overlook the octet rule?

Lauren Bui 1E
Posts: 54
Joined: Sat Jul 20, 2019 12:15 am

Re: Expanded Octet

Postby Lauren Bui 1E » Wed Nov 06, 2019 3:34 pm

some elements, especially beyond the 3rd period, can have an extended octet (aka hypervalency). for example, in the 4s block, the 3d is not full yet and can accept more electrons.

AVerma_F19
Posts: 59
Joined: Thu Jul 25, 2019 12:15 am
Been upvoted: 1 time

Re: Expanded Octet

Postby AVerma_F19 » Wed Nov 06, 2019 4:01 pm

It's because elements in Period 3 and higher have available space in the d shell to accommodate more electrons.

Emily Vainberg 1D
Posts: 102
Joined: Sat Jul 20, 2019 12:15 am

Re: Expanded Octet

Postby Emily Vainberg 1D » Thu Nov 07, 2019 11:18 am

Since the d shell has space for more electrons (10 in d shell compared to 6 in p shell) then certain elements can have expanded octets. The most common elements with expanded octets are Sulfur, phosphorus, silicon, and chlorine.

Anthony Hatashita 4H
Posts: 103
Joined: Wed Sep 18, 2019 12:21 am

Re: Expanded Octet

Postby Anthony Hatashita 4H » Thu Nov 07, 2019 5:25 pm

Element in the third period or further can have an expanded octet because the electrons and go into the d-orbital.

AngieGarcia_4F
Posts: 120
Joined: Thu Jul 25, 2019 12:17 am

Re: Expanded Octet

Postby AngieGarcia_4F » Thu Nov 07, 2019 6:44 pm

If they have a d orbital they can expand their octet

Jocelyn Thorp 1A
Posts: 103
Joined: Wed Sep 18, 2019 12:20 am

Re: Expanded Octet

Postby Jocelyn Thorp 1A » Thu Nov 07, 2019 7:13 pm

how can we know if they're likely to use the expanded octect though?

AmyL_3L
Posts: 50
Joined: Fri Aug 09, 2019 12:17 am

Re: Expanded Octet

Postby AmyL_3L » Sun Nov 10, 2019 8:19 pm

Elements in the third period and beyond are able to have expanded octets since they have more space in the d-orbital.

mayarivers3I
Posts: 52
Joined: Wed Sep 18, 2019 12:18 am

Re: Expanded Octet

Postby mayarivers3I » Mon Nov 11, 2019 4:54 pm

Elements with a d orbital, which are in the third period and beyond, can have an expanded octet.

PriscillaLi_3G
Posts: 63
Joined: Fri Sep 27, 2019 12:30 am

Re: Expanded Octet

Postby PriscillaLi_3G » Mon Nov 11, 2019 5:10 pm

Some elements (such as period 3) have empty d orbitals that can accommodate more electrons, and so we can overlook the octet rule for those atoms.

emwoodc
Posts: 45
Joined: Fri Aug 09, 2019 12:16 am

Re: Expanded Octet

Postby emwoodc » Fri Nov 15, 2019 9:06 am

elements beyond the 3rd period have extra room to take the extra electrons in! which allows it to be expanded


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