Octet Exceptions

[Sophia Dinh 1D]

Which elements don't follow the octet rule and why?

[Sarah Blake-2I]

Elements in period 3 or higher can have an expanded octet due to the inclusion of the d orbital.

[Midori Hupfeld 3D]

Also Hydrogen and Helium, as well as boron and the rest of column 3 can have incomplete octets. Hydrogen and helium can only hold 2 electrons because they only have an s shell.

[Midori Hupfeld 3D]

And, we learned that radicals are also an exception to the octet because they have an odd number of electrons (unpaired electrons).

[Shrayes Raman]

P-Block elements in periods or higher have unfilled d sub-shells so they can have expanded octets

[Lauren Sanchez 3D]

And, we learned that radicals are also an exception to the octet because they have an odd number of electrons (unpaired electrons).

Does this mean that radicals are more reactive then?

[JohannaPerezH2F]

the octet rule is strictly followed by B row and as you go down not that much, an example would be PBr5

[quresh3E]

Expanded Octet- 3rd row and bellow.
Incomplete Octet- First 5 elements and column under Al.