octet rule

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Chloe Orsini 1K
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Joined: Fri Sep 28, 2018 12:18 am

octet rule

Postby Chloe Orsini 1K » Wed Oct 31, 2018 2:29 pm

Will someone just re-explain the octet rule and its importance, I feel like i'm missing something.

Saleha_Mian_3E
Posts: 32
Joined: Fri Sep 28, 2018 12:25 am

Re: octet rule

Postby Saleha_Mian_3E » Wed Oct 31, 2018 2:38 pm

the octet rule is in a covalent bonds atoms share electrons until a noble gas configuration is reached. This was seen in the notes when he used the example with two fluorine atoms, combined they follow the octet rule since they have a noble gas configuration with eight electrons each in the valence shell (sharing two electrons).

JT Wechsler 2B
Posts: 62
Joined: Fri Sep 28, 2018 12:16 am

Re: octet rule

Postby JT Wechsler 2B » Wed Oct 31, 2018 3:19 pm

The octet rule is a guideline where each atom in a covalent bond should have 8 electrons (noble gas configuration) connected to it either through lone pairs or through bonds. There are exceptions to this rule.

Linyu Zeng 1H
Posts: 28
Joined: Fri Sep 28, 2018 12:19 am

Re: octet rule

Postby Linyu Zeng 1H » Wed Oct 31, 2018 5:08 pm

I prefer to understand it this way: when forming covalent bonds, atoms tend to share e- so that they have 8 e- (2 s-election and 6 p-electron) in their outmost shell. so for us, we just try to make all the atoms in a covalent bond formation as close to the 8-electron state as possible.

Gillian Ward 1F
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Joined: Fri Sep 28, 2018 12:27 am

Re: octet rule

Postby Gillian Ward 1F » Wed Oct 31, 2018 9:59 pm

Atoms want to have 8 electrons in their valence shell, so they seek to either gain or loose electrons. Having 8 valence electrons gives that atom a noble gas configuration which makes them the most stable.

Leslie Cheng 4B
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Joined: Fri Sep 28, 2018 12:29 am

Re: octet rule

Postby Leslie Cheng 4B » Wed Oct 31, 2018 10:16 pm

It's also good to note that the idea of filling octets is simply a guideline, not a rule. In the case of expanded valence shells like in the case of P, Cl, or S, these elements are able to have bonds that go beyond what an octet would allow.

Vicky Lu 1L
Posts: 60
Joined: Fri Sep 28, 2018 12:18 am

Re: octet rule

Postby Vicky Lu 1L » Wed Oct 31, 2018 10:34 pm

The octet rule concerns atoms wanting to share their electrons in order to complete their valence shell and be the most stable they can. To do this, atom want to either complete their last orbital shell or get rids of some on the last and share/lend it to another atom. They would want to share and have 8 valence electrons among themselves. However, atoms such as P, S, and Cl can have more than 8 valence electrons as they had a d-orbital to put electrons there. After n=3, those atoms can have an expanded octet since there is an empty orbital (d) that is not used.

Athena L 1B
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Joined: Fri Sep 28, 2018 12:18 am

Re: octet rule

Postby Athena L 1B » Thu Nov 01, 2018 3:53 pm

Once you get into elements beyond period 3, they can have more than 8 electrons because of the d orbital, allowing for expanded octets

Katie_Duong_1D
Posts: 69
Joined: Fri Sep 28, 2018 12:27 am

Re: octet rule

Postby Katie_Duong_1D » Thu Nov 01, 2018 11:06 pm

The octet rule is a guideline that atoms have 8 electrons surrounding it. However, there are exceptions to this rule.

Aidan Ryan 1B
Posts: 60
Joined: Fri Sep 28, 2018 12:17 am

Re: octet rule

Postby Aidan Ryan 1B » Thu Nov 01, 2018 11:09 pm

Hey guys. Why do some elements fill the 4s orbital to only halfway and then go to the D orbital until its filled.

Jack Mitchell 3J
Posts: 24
Joined: Fri Sep 28, 2018 12:24 am

Re: octet rule

Postby Jack Mitchell 3J » Thu Nov 01, 2018 11:28 pm

Its honestly just a "rule" because the most abundant atoms on earth generally follow the octet rule. (N, C, O)

Esther Lee 4H
Posts: 67
Joined: Fri Sep 28, 2018 12:29 am

Re: octet rule

Postby Esther Lee 4H » Sat Nov 03, 2018 11:58 am

it's just a rule that says you need to have a filled shell valence electrons in order for the compound to be "happy" and "satisfied" with their situation. since the goal is 8 valence electrons for a lot of the most abundant elements, it's just called the octet rule but the main goal is to have a complete outer shell not necessarily 8 because once you get to period 3 theres a chance to have more bonds.


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