Octet Rule

[Mariah]

How do we know which elements have expanded octets? Do these need to be memorized?

[ALegala_2I]

Professor Lavelle said that phosphorus, sulfur, and chlorine can have expanded octets. This is due to the fact that they have empty p orbitals which can accommodate additional electrons.

[904914037]

A UA also said that elements row three and beyond can have expanded octets because they have empty spots in the d shell to fill.

[Omar Selim 1D]

Elements in row 3 and beyond is usually the rule of thumb because they have empty orbitals

[Abigail Sanders 1E]

Like the previous replies have said, expanded octets can occur in elements of row 3 and beyond. When checking for resonance and finding the lowest energy structure, make sure to calculate formal charge along with the bonding as ti will help you reach the final stage where resonance can be examined.

[Grecia Velasco 1G]

How do we know which elements have expanded octets? Do these need to be memorized?

Lavelle said that elements in row three have expanded octets.

[Verity Lai 2K]

All elements past row three because they have the extra d-orbital space. P, Cl and S were the beginning of this exception and I think these are the most important ones to remember. And then boron and aluminum can be stable without a full octet.

[Brittany Tran 3I]

elements in the 3rd period on have expanded octets but P, S, and Cl are the most important ones to remember

[Anokhi Patel 2B]

Elements in the third period, S, P, and Cl are exceptions to the octet rules. For example, Sulfur is capable of making 6 bonds. This was shown in the example of SF6.