Anion

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AprilPaz
Posts: 51
Joined: Wed Sep 18, 2019 12:18 am

Anion

Postby AprilPaz » Fri Oct 25, 2019 6:15 pm

How would I represent an anion in a lewis structure?

Eileen Si 1G
Posts: 120
Joined: Fri Aug 30, 2019 12:17 am

Re: Anion

Postby Eileen Si 1G » Fri Oct 25, 2019 6:23 pm

For an anion, you would add the negative charge to the number of electrons in order to figure out the total number of electrons to draw in the Lewis structure. Moreover, you can then draw brackets around the whole Lewis structure and write the negative charge outside the top right corner of the brackets.

nickianel_4b
Posts: 50
Joined: Thu Jul 25, 2019 12:17 am

Re: Anion

Postby nickianel_4b » Fri Oct 25, 2019 7:25 pm

Similarly with cations, take the charge into account when counting the number of valence electrons, and then put brackets around the structure with the charge written on the outside.

Anna Heckler 2C
Posts: 102
Joined: Wed Sep 18, 2019 12:18 am

Re: Anion

Postby Anna Heckler 2C » Fri Oct 25, 2019 7:30 pm

An anion is indicated in a Lewis structure by drawing brackets around the molecule with the overall charge written out next to it. When determining how to draw this Lewis structure, you sum the valence electrons of all atoms in the molecule. Then, you add the number of electrons indicated by the charge of the anion to the previous sum.

Lauren Tanaka 1A
Posts: 109
Joined: Sat Aug 17, 2019 12:18 am

Re: Anion

Postby Lauren Tanaka 1A » Sat Oct 26, 2019 7:29 pm

Typically you would represent that it's an anion by adding a negative sign in the top right hand corner after the brackets.

Anna Chen 1K
Posts: 104
Joined: Thu Jul 25, 2019 12:18 am

Re: Anion

Postby Anna Chen 1K » Sat Oct 26, 2019 8:01 pm

First, add the negative charge to the total number of electrons in order to know how many electrons to represent in the Lewis structure. Second, you can draw brackets around the Lewis structure and write the negative charge besides the top right corner.

JasonKwon_3k
Posts: 51
Joined: Thu Jul 11, 2019 12:16 am

Re: Anion

Postby JasonKwon_3k » Sat Oct 26, 2019 11:24 pm

The Lewis structure of anion must have one less electron than it would usually have, in addition to the brackets around the overall compound.

Quynh Vo
Posts: 45
Joined: Sun Sep 29, 2019 12:15 am

Re: Anion

Postby Quynh Vo » Sun Oct 27, 2019 3:12 pm

You calculate the number of electrons (plus/subtract positive/negative charge) and then draw the lewis structure. You also put brackets around the entire model and indicate the charge on the top right outside the brackets.


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