Octet Rule

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aphung1E
Posts: 101
Joined: Sat Aug 24, 2019 12:15 am

Octet Rule

Postby aphung1E » Wed Oct 23, 2019 3:51 pm

If the element is past the second period in the periodic table does it still need to follow the octet rule?

Subashni Rajiv 1K
Posts: 101
Joined: Wed Sep 18, 2019 12:16 am

Re: Octet Rule

Postby Subashni Rajiv 1K » Wed Oct 23, 2019 3:58 pm

Yes! The octet rule is applicable to most elements, including the ones past the second period.

Hannah Romano 4D
Posts: 55
Joined: Sat Aug 24, 2019 12:18 am

Re: Octet Rule

Postby Hannah Romano 4D » Wed Oct 23, 2019 4:02 pm

Two exceptions to the octet rule are B and Al which may form 3 bonds and Si which may form 6 bonds.

Astrid Lunde 1I
Posts: 103
Joined: Sat Sep 07, 2019 12:16 am

Re: Octet Rule

Postby Astrid Lunde 1I » Wed Oct 23, 2019 4:03 pm

There are a few exceptions, but generally yes they need to follow the octet rule.

Malia Shitabata 1F
Posts: 127
Joined: Sat Aug 17, 2019 12:17 am

Re: Octet Rule

Postby Malia Shitabata 1F » Thu Oct 24, 2019 12:19 pm

I wrote at the end of class after we were drawing Lewis structures that the octet rule holds strictly for C, N, O, F, Ne. Did I mishear or does this mean something different since it doesn't make sense that other elements wouldn't follow the octet rule.

Maia_Jackson_2C
Posts: 101
Joined: Fri Aug 30, 2019 12:17 am

Re: Octet Rule

Postby Maia_Jackson_2C » Thu Oct 24, 2019 4:00 pm

I thought I heard that the octet rule is more of a guideline, but the exceptions are H, He, Li, and Be

Tiffany Vo 3G
Posts: 52
Joined: Sat Aug 17, 2019 12:17 am

Re: Octet Rule

Postby Tiffany Vo 3G » Thu Oct 24, 2019 10:09 pm

aphung1G wrote:If the element is past the second period in the periodic table does it still need to follow the octet rule?


Almost all atoms follow the octet rule because it's more stable, except for hydrogen, helium, lithium and beryllium. With those atoms, having a different number of bonds aids in the stability of these atoms.


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