Lewis Structures- formal charge

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Shundeen Martinez 1D
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Joined: Fri Sep 28, 2018 12:18 am

Lewis Structures- formal charge

Postby Shundeen Martinez 1D » Tue Oct 30, 2018 10:29 pm

How can you find the formal charges on each atom in a Lewis structure?

Jocelyne Milke 1G
Posts: 73
Joined: Fri Sep 28, 2018 12:25 am

Re: Lewis Structures- formal charge

Postby Jocelyne Milke 1G » Tue Oct 30, 2018 10:36 pm

You use the equation FC= V-(L+S/2), where FC is the formal charge, V is the number of valence electrons, L is the number of lone pairs, and S is the number of shared electrons.

Javier_Ochoa_DIS_3J
Posts: 33
Joined: Fri Sep 28, 2018 12:23 am

Re: Lewis Structures- formal charge

Postby Javier_Ochoa_DIS_3J » Thu Nov 01, 2018 4:46 pm

This is the equation to find the formal charge.

Valance electrons - (lone pair electrons + number of bonds) = Formal charge.

Lauren Ho 2E
Posts: 70
Joined: Tue Oct 09, 2018 12:16 am

Re: Lewis Structures- formal charge

Postby Lauren Ho 2E » Thu Nov 01, 2018 5:27 pm

Javier_Ochoa_DIS_3J wrote:This is the equation to find the formal charge.

Valance electrons - (lone pair electrons + number of bonds) = Formal charge.


I like using this equation more than the FC = V - (L + S/2) one because there is less room for error!

Sapna Ramappa 1J
Posts: 63
Joined: Fri Sep 28, 2018 12:24 am

Re: Lewis Structures- formal charge

Postby Sapna Ramappa 1J » Fri Nov 02, 2018 2:30 pm

In order to calculate formal charge, use this equation:
FC= V - (L+ (S/2)), where V is the number of valence electrons, L is the number of electrons in lone pairs, and S is the number of shared electrons.

Hope this helps! :)


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