Octet Expansion

[Jose Robles 1D]

At what period do elements begin to have the option to expand their octet?

[EvaLi_3J]

Starting from period 3, elements have the chance to expand their octets. Because in period three, electron orbitals go up to 3d.

[AndreiRekesh1I]

Period 3, because that's when D-orbitals become available to accommodate extra electrons.

[Daniel Yu 1E]

Octet expansion only occurs when a period 3 element utilizes a d orbital.

[simona_krasnegor_1C]

Adding on the what has been said about period 3 and below, it is important to note that this means period 2 elements, such as C, N, O, and F, cannot expand their octet.

[Ashley Lopez 3J]

Any element from Period 3 and below are able to expand, meaning elements like C, N, O are not part of that rule because they are exceptions to it. Reminder to always be careful when you are working with these elements and their surrounding electrons.