Octet exception
Moderators: Chem_Mod, Chem_Admin
-
- Posts: 105
- Joined: Sat Jul 20, 2019 12:16 am
Re: Octet exception
Elements in the 3p or higher orbital are exceptions to the octet rule. This is because they have an empty d-orbital that allows them to hold more than 8 valence e-, e.g. for P, it is located in the 3p orbital, but has an empty 3d orbital that allows it to hold more than 8 e- and be an exception.
-
- Posts: 98
- Joined: Wed Sep 11, 2019 12:16 am
Re: Octet exception
Elements that have a d-orbital are able to have more than an octet, as the electrons will go into the d-orbital. These are basically all the elements in the 3rd row and down.
-
- Posts: 102
- Joined: Fri Aug 09, 2019 12:15 am
-
- Posts: 102
- Joined: Thu Jul 11, 2019 12:17 am
-
- Posts: 56
- Joined: Wed Sep 18, 2019 12:19 am
-
- Posts: 54
- Joined: Wed Sep 18, 2019 12:20 am
Re: Octet exception
Atoms in row 3 and below on the periodic table can typically have expanded octets.
-
- Posts: 117
- Joined: Sat Sep 14, 2019 12:17 am
Re: Octet exception
Michelle Song 3I wrote:Boron and Aluminum are also exceptions in that they can form only 3 bonds.
Exactly. But to be more specific, without any additional lone pairs, the number of valence electrons around boron and aluminum is then only 6, not reaching octet.
-
- Posts: 98
- Joined: Fri Aug 30, 2019 12:15 am
Re: Octet exception
Jonathan Gong 1A wrote:Elements in the 3p or higher orbital are exceptions to the octet rule. This is because they have an empty d-orbital that allows them to hold more than 8 valence e-, e.g. for P, it is located in the 3p orbital, but has an empty 3d orbital that allows it to hold more than 8 e- and be an exception.
This is correct for atoms that can have more than 8 electrons, but Boron and Aluminum can also break the rule in that they can form compounds with only 6 valence electrons.
-
- Posts: 103
- Joined: Fri Aug 30, 2019 12:17 am
- Been upvoted: 1 time
Re: Octet exception
Any element in the beyond 3s2 will be able to form more than four bonds and is therefore an exception because the d orbital begins in principle energy level 3 and is therefore able to accomodate more than the standard 8 electrons.
-
- Posts: 103
- Joined: Sat Aug 24, 2019 12:15 am
Re: Octet exception
Elements with the third energy shell and on since the d-orbital can also have electrons
-
- Posts: 51
- Joined: Thu Jul 11, 2019 12:16 am
Re: Octet exception
elements after the third period are where they will be able to display expanded octet behavior.
-
- Posts: 112
- Joined: Wed Sep 30, 2020 10:01 pm
- Been upvoted: 1 time
Re: Octet exception
H, He, Li, Be are not part of the octet rule because H and He only need to fill up an S orbital to satisfy the orbital and since Li and Be are closest to Helium, they will lost electrons to reach the amount of valence electrons/the state of helium and therefore they don't and won't have to fill an 8 electron shell orbital.
Who is online
Users browsing this forum: No registered users and 2 guests