expanded octet

[Sophia Dinh 1D]

When can you assume the octet can expand?

[Kallista McCarty 1C]

The octet can expand past the second row

[Daniel Toscano 1L]

If the element is in the 3rd row or under in the periodic table, then it can have an expanded octet as the third row has access to the d-block, which can hold ten more electrons if needed.

[Ashley Kim 3F]

Elements with orbitals in the d-block can have expanded octets. However, although P, S, and Cl do not have orbitals in the d-block, they are exceptions to the octet rule and can also hold more electrons than the standard octet.

[Caitlin Ciardelli 3E]

The elements that are in row three and below can have expanded octets. This is due to the fact that the elements row three and below can utilize the d orbital, allowing an additional ten electrons after the initial octet. Row 2 and above however, is limited to an octet, eight electrons, because they can only utilize s and p orbitals.

[Diana A 2L]

Why do P, S, and Cl have expanded octets if they don't have d-orbitals? It doesn't make much sense.

[AronCainBayot2K]

Elements that can have expanded octets include the 3rd row and every element below. This is due to the d-block with some elements as an exception to this rule. Elements above the third row must fulfill the octet rule when drawing a lewis structure.

[Kaitlynn Tran 3F]

Most atoms after P on the periodic table in the d-block can have an expanded octet.