octet rule exceptions

[sticky1]

Are there any elements which do not follow the octet rule? Are there any exceptions to the octet rule?

---

Members don't see this ad.

 

[Anthrax]

Boron usually forms 3 bonds (6 electrons)....covalent bonds that is, obviously.

Also, I would say elements which have a 3d subshell are capable of forming more than 4 bonds.

 

[britsmedicine]

anything that is beyond the 2nd row can have an expanded octet

 

[Godric]

anything that is beyond the 2nd row can have an expanded octet

+1 or I just remember anything past Ne will violate the octet rule. Same thing different wording.

 

[sciencebooks]

Boron usually forms 3 bonds (6 electrons)....covalent bonds that is, obviously.

Also, I would say elements which have a 3d subshell are capable of forming more than 4 bonds.

Yeah, this one definitely comes up a lot for the ones UNDER 8. Plus, of course, H2 and such.

 

[Erythropoietin]

H, Be, B...

 

[going2breakdown]

One of those guys above has the right idea. BELOW period (row) 2. However! Formal charge rules still apply e.g. for sulfur has six valence electrons and still wants to have two lone pairs and a two bonds to get 0, OR six bonds to it, either way...