Octet Rule Exceptions

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Ashley Wang 4G
Posts: 103
Joined: Wed Sep 11, 2019 12:16 am

Octet Rule Exceptions

Postby Ashley Wang 4G » Sun Oct 27, 2019 11:46 pm

In class, we discussed how atoms in period 3 or higher can accommodate additional electrons than described by the octet rule because they have access to d-orbitals. I was wondering why these d-orbitals can be occupied when bonding even though they aren't used when the atoms exist in and of themselves? Thank you!

Serena Siddiq 3D
Posts: 51
Joined: Fri Aug 30, 2019 12:17 am

Re: Octet Rule Exceptions

Postby Serena Siddiq 3D » Sun Oct 27, 2019 11:49 pm

All it is saying is that because those elements are farther down the periodic table than period 3, they can accommodate for more electrons if need be since they have more room in their shells (sometimes they do not have to) depending on the compound you are drawing a Lewis structure for. Hope that helps!

Hussain Chharawalla 1G
Posts: 100
Joined: Sat Jul 20, 2019 12:15 am

Re: Octet Rule Exceptions

Postby Hussain Chharawalla 1G » Sun Oct 27, 2019 11:53 pm

They aren't used by atoms regularly because atoms in period 3 themselves do not have enough electrons to use the d orbitals. Remember until 4s2, the d is higher energy than s orbital.

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