## Equation

$FC=V-(L+\frac{S}{2})$

Kate Manganaro 1F
Posts: 32
Joined: Fri Apr 06, 2018 11:03 am

### Equation

In high school I learned a different equation for the formal charge. It is FC = valence e- - owned e- (the electrons that the atom has in the structure. The equation we learned in class is FC = VE - NE - 1/2 * BE. I believe you get the same answer either way, but is one equation more reliable to use than the other?

nelquosey
Posts: 31
Joined: Fri Apr 06, 2018 11:02 am

### Re: Equation

I would use the one we learnt in class to get my answer and use the high school one to check my answer.

alexagreco1A
Posts: 34
Joined: Fri Apr 06, 2018 11:03 am

### Re: Equation

It seems like the one you learned in high school may be a simplified version. Although it gives you the right answer, I feel like you should use the one that was given to us in class in terms of which will be more reliable.

Chem_Mod
Posts: 18170
Joined: Thu Aug 04, 2011 1:53 pm
Has upvoted: 428 times

### Re: Equation

They are the same thing. I can put it in the same perspective.

FC = valence e- - owned e- = VE - (Lone pair e- + 1/2 * Bonding e-) = VE - LPE - 1/2BE