Drawing Lewis Structures with Charges

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sallina_yehdego 2E
Posts: 75
Joined: Sun Apr 29, 2018 3:00 am

Drawing Lewis Structures with Charges

Postby sallina_yehdego 2E » Fri Oct 26, 2018 10:03 pm

When drawing Lewis Structures for polyatomic molecules, what are the rules if charges exist?

MinaChoi_3H
Posts: 31
Joined: Fri Sep 28, 2018 12:25 am

Re: Drawing Lewis Structures with Charges

Postby MinaChoi_3H » Fri Oct 26, 2018 11:43 pm

For cations, remove 1 e- for each +1 charge. For anions, add 1 e- for each -1 charge.

Sofia Ban
Posts: 30
Joined: Fri Sep 28, 2018 12:25 am

Re: Drawing Lewis Structures with Charges

Postby Sofia Ban » Sat Oct 27, 2018 10:26 am

It is also important to note that when counting electrons, negative ions should have extra electrons placed in their Lewis structures and positive ions should have less electrons than the uncharged molecule. After the Lewis structure of the ion is written, place the entire structure in brackets, and write the charge as a superscript on the upper right, outside of the brackets.

RoopshaChatterjee 1G
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Joined: Fri Sep 28, 2018 12:17 am

Re: Drawing Lewis Structures with Charges

Postby RoopshaChatterjee 1G » Sun Oct 28, 2018 9:41 am

Can Lewis structures be used to construct the molecular structure of the element?

Karla_Ocampo 4E
Posts: 32
Joined: Tue Nov 21, 2017 3:01 am

Re: Drawing Lewis Structures with Charges

Postby Karla_Ocampo 4E » Sun Oct 28, 2018 10:10 am

Hi! So for drawing Lewis structures, you remove one electron for each + 1 charge, and add one electron for each -1 charge.

404536963
Posts: 29
Joined: Fri Feb 02, 2018 3:02 am

Re: Drawing Lewis Structures with Charges

Postby 404536963 » Sun Oct 28, 2018 9:56 pm

RoopshaChatterjee 1G wrote:Can Lewis structures be used to construct the molecular structure of the element?


So Lewis Structures tell you the valence electron # of the atoms, so it can help tell you the position the atom has in a molecule. So because molecular structures are dependent on the spatial orientation of covalent bonds, drawing out the Lewis structure can help.

Andreana Vetus 1A
Posts: 28
Joined: Fri Sep 28, 2018 12:17 am

Re: Drawing Lewis Structures with Charges

Postby Andreana Vetus 1A » Sun Oct 28, 2018 9:58 pm

When it comes to actually drawing the structures, put giant brackets around the whole drawing to indicate the quantity and then mark the charge outside the brackets on the top right corner.


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