Octet exception examples

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Jina Kwon
Posts: 100
Joined: Fri Aug 09, 2019 12:15 am

Octet exception examples

Postby Jina Kwon » Thu Oct 24, 2019 4:53 pm

What are the octet exception examples that we usually need to know on tests?

William Francis 2E
Posts: 101
Joined: Wed Sep 18, 2019 12:20 am

Re: Octet exception examples

Postby William Francis 2E » Thu Oct 24, 2019 5:25 pm

The lecture slides listed H, He, Li, and Be as exceptions to the octet rule. However, I think that Dr. Lavelle said that we'd discuss more exceptions in the next lecture.

Jordan Young 2J
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Re: Octet exception examples

Postby Jordan Young 2J » Thu Oct 24, 2019 6:04 pm

Boron also is an exception at times and there are some elements in the periodic table that can hold more than 8 electrons, but I think we'll talk about these in class at some point.

Daniel Martinez 1k
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Joined: Wed Sep 18, 2019 12:16 am

Re: Octet exception examples

Postby Daniel Martinez 1k » Thu Oct 24, 2019 6:27 pm

During Wednesday's lecture, he mentioned H, He, Li, and Be as being exceptions to the octet rule because it was very unlikely that they would gain the electrons needed to complete an octet.

Kelvin Chung 1C
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Joined: Sat Aug 24, 2019 12:15 am

Re: Octet exception examples

Postby Kelvin Chung 1C » Fri Oct 25, 2019 5:35 am

Jordan Young 3E wrote:Boron also is an exception at times

Boron typically has 6 valence electrons, forming 3 covalent bonds. Right?

rachel liu 3k
Posts: 56
Joined: Sat Aug 17, 2019 12:16 am

Re: Octet exception examples

Postby rachel liu 3k » Fri Oct 25, 2019 9:19 am

Kelvin Chung 1C wrote:
Jordan Young 3E wrote:Boron also is an exception at times

Boron typically has 6 valence electrons, forming 3 covalent bonds. Right?

Yup!

Claire Lo 3C
Posts: 55
Joined: Sat Aug 17, 2019 12:18 am

Re: Octet exception examples

Postby Claire Lo 3C » Fri Oct 25, 2019 2:17 pm

also P, S, Cl may exceed the octet rule

ayushibanerjee06
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Re: Octet exception examples

Postby ayushibanerjee06 » Fri Oct 25, 2019 4:58 pm

Claire Lo 3C wrote:also P, S, Cl may exceed the octet rule

Yeah, Dr. Lavelle said these elements can exceed the octet rule because they have empty d orbital electrons

Nicholas_Gladkov_2J
Posts: 125
Joined: Sat Aug 17, 2019 12:17 am

Re: Octet exception examples

Postby Nicholas_Gladkov_2J » Fri Oct 25, 2019 11:23 pm

Jina Kwon wrote:What are the octet exception examples that we usually need to know on tests?


In addition to the octet examples that others mentioned (H, He, Li, Be, and occasionally B), elements after phosphorus can have an expanded octet due to the additional d shell orbitals in n=3 and after.

NicoJones_1B
Posts: 49
Joined: Fri Aug 09, 2019 12:16 am

Re: Octet exception examples

Postby NicoJones_1B » Sun Oct 27, 2019 10:05 pm

Why are H, He, Li, and Be able to exceed the normal level of valence electron bonds?


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