Exceptions to the Octet Rule

(Polar molecules, Non-polar molecules, etc.)

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304744081
Posts: 6
Joined: Thu Feb 02, 2017 3:00 am

Exceptions to the Octet Rule

Postby 304744081 » Thu Nov 16, 2017 10:55 pm

When building lewis structures, do exceptions to the octet rule only occur for the halogens or do they also happen for the metalloids?

Kevin Liu 3G
Posts: 28
Joined: Fri Sep 29, 2017 7:07 am

Re: Exceptions to the Octet Rule

Postby Kevin Liu 3G » Thu Nov 16, 2017 11:57 pm

Exceptions to the octet rule can occur after n = 3. This makes sense once you take into account the d orbital meaning that the atom has so much more room for others to bond. There are also exceptions where the central atom is under 8 electrons and I believe Boron is one example of this.

Manasvi Paudel 1A
Posts: 50
Joined: Sat Jul 22, 2017 3:00 am

Re: Exceptions to the Octet Rule

Postby Manasvi Paudel 1A » Fri Nov 17, 2017 8:21 pm

The elements that can exceed the octet rule and have more than eight electrons are those who have a quantum number of 3 or above!

soniatripathy
Posts: 50
Joined: Thu Jul 13, 2017 3:00 am

Re: Exceptions to the Octet Rule

Postby soniatripathy » Mon Dec 04, 2017 12:27 am

the first element in the periodic table to have an expanded octet is phosphorus. There are definitely others like boron that are satisfied with 6 electrons. Two really good exceptions to the octet to know are phosphorous with 10 and sulfur with 12. Those are ones that come up a lot esp with compounds like SF6 and PCl5.

Thompson W 2C
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Re: Exceptions to the Octet Rule

Postby Thompson W 2C » Sat Dec 09, 2017 5:47 am

Elements in Period 3 and beyond are exceptions to the octet rule!


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