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Why can't Aluminum have an expanded octet?

Posted: Thu Nov 07, 2019 10:30 am
by tonyhu
Does Al not have access to the d orbitals? why?

Re: Why can't Aluminum have an expanded octet?

Posted: Thu Nov 07, 2019 11:03 am
by AKhanna_3H
Aluminum does not have an expanded octet. Since it is a group 3 atom it sometimes violates the octet rule by having less than 8 valence electrons when bonded.

Re: Why can't Aluminum have an expanded octet?

Posted: Thu Nov 07, 2019 10:49 pm
by Junwei Sun 4I
Aluminum does not have an expanded octet. Aluminum is an exception just like boron where it can be octet deficient. Just like in BF3 boron is stable with only six electrons, in AlCl3 aluminum also does not fill an octet.

Re: Why can't Aluminum have an expanded octet?

Posted: Fri Nov 08, 2019 11:21 am
by AniP_2D
Al can not have an expanded octet because only elements Phosphorus and onward can have more than 8 electrons. However, Al is one the exceptions to the octet rule in the case that it can have less than 8 electrons.

Re: Why can't Aluminum have an expanded octet?

Posted: Sun Dec 01, 2019 9:27 pm
by Natalie Wang 1B
As everyone else has said, Aluminum can have less than the octet rule. Boron is another important element that can have less than the octet rule.

Re: Why can't Aluminum have an expanded octet?

Posted: Fri Dec 06, 2019 12:46 pm
by Kaitlynn Tran 3F
Atoms that can have an expanded octet start with P on the periodic table and continue onwards. Aluminum is before P, so it can't have an expanded octet.