## Lewis Structures- formal charge

Shundeen Martinez 1D
Posts: 31
Joined: Fri Sep 28, 2018 12:18 am

### Lewis Structures- formal charge

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

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

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

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

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! :)