List of Octet exceptions

[Alvaro Chumpitaz 4D]

Is there a definitive number of elements that will disobey the octet rule?

[Kavya Immadisetty 2B]

I know for sure that H, Li, Be, and B generally form a duplet instead of an octet. Also, once the elements pass the 3p block, it can have an expanded valence electron shell and form more than an octet.

[AlyshaP_2B]

Usually, non-metals with a d-subshell can have expanded octets because there are more spaces for electrons to fill

[Veronica_Lubera_2A]

Essentially elements can disobey the octet rule in two ways:

1. They can break it by their massive size and extra space of a d-block.
(3 row periodic table and below)

2. They don't reach their 'full potential' of the octet rule because of a high ionization energy. (Ex: BF3; Boron will only have 6 valence electrons because of Flourine's high ionization energy).

[Natalie Benitez 1E]

Is there a limit on the number of electrons the exceptions to the octet rule can have?

[Kellylin_4D]

Here are some that I got from my plf session

sulfur can have 12 valence e
Nitrogen actually prefers 5
Boron can have 6 valence e

and the ones included by our peers
hopes this helps!

[805097738]

Is there a limit on the number of electrons the exceptions to the octet rule can have?

I believe they tend to hold 10-12 electrons.