Expanded Octet

[juleschang16]

What are the expanded octet rules? Which elements can have expanded octets?

[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!

[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.

[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

[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.

[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.

[Sheridan Slaterbeck 1J]

Row 2 elements usually never have expanded octet.

[705022748]

Expanded octet is when an element can have more than 8 electrons, such as elements in the d-orbital.

[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.