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Expanded Octet

Posted: Fri Nov 16, 2018 6:17 pm
by juleschang16
What are the expanded octet rules? Which elements can have expanded octets?

Re: Expanded Octet

Posted: Fri Nov 16, 2018 6:21 pm
by Alli Hinmon 3E
Any element in the 3rd period and down can have an expanded octet. Also row 13 has some exceptions to the octet rule. Remember H only can can 1 bond!

Re: Expanded Octet

Posted: Fri Nov 16, 2018 7:15 pm
by monikac4k
As we learned the wave function numbers and their meaning we learned that we are dealing with a d orbital when l=2. For l to equal 2 the value of n must be at least 3. This means elements in the 3rd period possess a d sub-shell. However, we also learned that the electron configuration for an element like phosphorus is [Ne] 3s2 3p3. There are no electrons within the d subshell. From these observations we can conclude that any element in period 3 or higher possesses an empty d subshell, allowing them to possess more than just the normal octet of electrons.

Re: Expanded Octet

Posted: Fri Nov 16, 2018 8:46 pm
by Maria Nabagala 3E
Elements with expanded octets can have more than 8 electrons. Usually elements in period 3 have expanded octets meaning you can put more than 8 electrons on those elements

Re: Expanded Octet

Posted: Sun Nov 18, 2018 10:57 pm
by Isabelle_Maletz_3E
In order to have an expanded octet, the central atom must be in an energy level that would allow this. Therefore only elements that have access to a d-orbital can typically have expanded octets.

Re: Expanded Octet

Posted: Sun Nov 25, 2018 10:33 pm
by Katie_Duong_1D
Any element period 3 and below can have an expanded octet because they can also have d orbitals (10 valence electrons). For example, Phosphorus can have an expanded octet because it is in period 3, while Nitrogen cannot have an expanded octet because it is in period 2.

Re: Expanded Octet

Posted: Sun Nov 25, 2018 10:34 pm
by Sheridan Slaterbeck 1J
Row 2 elements usually never have expanded octet.

Re: Expanded Octet

Posted: Mon Nov 26, 2018 1:03 am
by 705022748
Expanded octet is when an element can have more than 8 electrons, such as elements in the d-orbital.

Re: Expanded Octet

Posted: Mon Nov 26, 2018 1:42 am
by 405098546
Expanded octet is when an atom can hold more than 8 valence electrons in a lewis structure. So some atoms like sulfur, phosphorous, or chlorine are more prone to expanded octets. This is something you should simply keep in mind.