Lewis Structures for Ionic Bonds

Moderators: Chem_Mod, Chem_Admin

Victoria Luu - 1C
Posts: 60
Joined: Fri Sep 28, 2018 12:15 am

Lewis Structures for Ionic Bonds

Postby Victoria Luu - 1C » Mon Nov 05, 2018 1:24 pm

What's the difference when drawing a lewis structure for an ionic and covalent bond?

ChathuriGunasekera1D
Posts: 78
Joined: Fri Sep 28, 2018 12:17 am

Re: Lewis Structures for Ionic Bonds

Postby ChathuriGunasekera1D » Mon Nov 05, 2018 1:32 pm

There's not really a difference when drawing, because Lewis structures just outline the lone pairs and what types of bonds exist within a molecule.

ellienelson4F
Posts: 7
Joined: Fri Sep 28, 2018 12:27 am

Re: Lewis Structures for Ionic Bonds

Postby ellienelson4F » Mon Nov 05, 2018 1:50 pm

A lewis structure for a covalent bond will have shared pairs, of electrons while a lewis structure for an ionic bond will just demonstrate charge and valence electrons. Below is the lewis structure of NaCl, an ionic compound, so you can see the difference.
Attachments
Screen Shot 2018-11-05 at 1.47.44 PM.png

Brian Hom 2F
Posts: 60
Joined: Fri Sep 28, 2018 12:24 am

Re: Lewis Structures for Ionic Bonds

Postby Brian Hom 2F » Mon Nov 05, 2018 2:12 pm

Lewis structures for ionic bonds are just the cations and anions put side by side with the charges of each ion put to the side of the respective ion. Make sure that each atom has an octet.

Adam Vuilleumier 2K
Posts: 60
Joined: Fri Sep 28, 2018 12:27 am

Re: Lewis Structures for Ionic Bonds

Postby Adam Vuilleumier 2K » Mon Nov 05, 2018 2:23 pm

I was just wondering why we put the 8 electrons around the anion, but we don't for the cation. Don't they both have filled valence shells?

ellienelson4F
Posts: 7
Joined: Fri Sep 28, 2018 12:27 am

Re: Lewis Structures for Ionic Bonds

Postby ellienelson4F » Mon Nov 05, 2018 3:05 pm

I think the reason you put the dots (8 electrons) around the anion and not the cation is to demonstrate which of the atoms has just gained a full shell. It explains the concept of the anion filling its outer shell while the cation has emptied its previously most outer shell.


Return to “Lewis Structures”

Who is online

Users browsing this forum: No registered users and 0 guests