## Formal Charge [ENDORSED]

Lilyana Villa 1J
Posts: 50
Joined: Sat Aug 17, 2019 12:15 am

### Formal Charge

Can someone explain what formal charge is and how you calculate it? Thank you

Akshay Chellappa 1H
Posts: 59
Joined: Wed Sep 11, 2019 12:15 am

### Re: Formal Charge  [ENDORSED]

Formal charge is the charge which is assigned to an atom in a molecule. To calculate formal charge you add the number of lone pair electrons to half of the number of bound electrons, and subtract the sum from the number of valence electrons.

Marty Hockey
Posts: 47
Joined: Wed Sep 18, 2019 12:19 am

### Re: Formal Charge

The formal charge of an atom indicates gain or loss of electrons while forming a covalent bond. To determine formal charge, count the number of shared electrons (s), count each number of lone pair electron (L) and then follow the formula: FC (formal charge) = V (valence electrons) - (L + s/2)

Kayli Choy 2F
Posts: 100
Joined: Sat Aug 24, 2019 12:17 am

### Re: Formal Charge

Additionally, if your molecule is charged, the sums each of the formal charges of the atoms should equal the total charge of the molecule. The Lewis structure in which formal charges of individual atoms are closest to zero represents the lowest energy arrangement.

EricZhao3G
Posts: 51
Joined: Tue Oct 08, 2019 12:16 am

### Re: Formal Charge

Formal charge is the charge assigned to an atom assuming the electrons are shared equally. You calculate formal charge with the equation FC = V - (L + S/2) where FC = formal charge, V = valence electrons, L = lone pair electrons, and s = shared electrons of that specific atom.

Veronica_Lubera_2A
Posts: 106
Joined: Sat Sep 14, 2019 12:16 am
Been upvoted: 1 time

### Re: Formal Charge

In the formula, instead of using S/2 I just count the number of bonds with that atom and you get the same answer. I think it's a little bit easier since you don't have to divide by two and can subtract that exact number.

lauraxie2e
Posts: 108
Joined: Fri Aug 09, 2019 12:17 am

### Re: Formal Charge

Formal charge is the charge assigned to a bonded atom. The formula is FC=V-(LP+0.5BP)