More then 8 electrons

[Leslie Almaraz 4G]

If an element has more than 8 electron in the outer shell, is this allowed because it has another orbital it can fill?

[Vanessa Chuang 4F]

Yes you are correct. The reason why an element can possibly have an extended octet (aka more than 8 electrons in the outer shell) is because there is the d orbital that the extra electrons can fill. This is the reason all elements located in rows 1 and 2 cannot possibly have more than 8 electrons because they have no d orbital to carry those extra electrons.

[Jennifer Yang 3F]

Yes, it can fit into the d orbital.

[lasarro]

If the highest energy level is a d orbital, then yes, the atom can hold up to 10 valence electrons.

[SVajragiri_1C]

It is only allowed when the the central atom with the expanded octet is in the 3rd row of the periodic table or below, because only these elements have a d-orbital.

[sarahsalama2E]

Yes, this is allowed because it has an expanded octet due to the d orbital which can hold up to 10 electrons.