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### Formal Charge

Posted: Wed Jul 31, 2019 2:00 am
When making a Lewis structure for an ion, does it matter what atom the formal charge is on, or the structure is valid as long as the overall formal charge is correct?

### Re: Formal Charge

Posted: Wed Jul 31, 2019 7:56 am
I believe the more electronegative atom of the two involved in a bond would be the more likely atom to have the negative formal charge. However, I'm not sure if the opposite is true for the positive formal charges.

### Re: Formal Charge

Posted: Fri Nov 08, 2019 6:09 am
For most stable structures, the more electronegative atom should typically be the one with the negative formal charge and the opposite is true for the opposite case.

### Re: Formal Charge

Posted: Fri Nov 08, 2019 9:34 am
What's the equation for the formal charge?

### Re: Formal Charge

Posted: Fri Nov 08, 2019 9:44 am
VioletKo3F wrote:What's the equation for the formal charge?

V-(L+S/2) where V is for valence electrons, L is for number of lone electrons, and S is for number of shared electrons.

### Re: Formal Charge

Posted: Fri Nov 08, 2019 10:34 am
After checking the formal charge, we also prefer structures that have -1 on the more electronegative atoms.

### Re: Formal Charge

Posted: Sat Nov 09, 2019 11:06 pm
You want to minimize the magnitude of formal charges for the sum of the atoms. You want to maximize the number of formal charges of 0.

### Re: Formal Charge

Posted: Sat Nov 09, 2019 11:24 pm
The most stable Lewis structure for an ion is the one that minimizes formal charges (minimize having separate charges). Also, the negative formal charge should be on the most electronegative atom.

### Re: Formal Charge

Posted: Sun Nov 10, 2019 11:44 am
The most electronegative atom has the most negative charge on it, but when we want the lowest energy structure with the least amount of formal charges as possible.

### Re: Formal Charge

Posted: Sun Nov 10, 2019 4:31 pm
The most electronegative atom should have the negative charge, I think it does matter what the formal charges are on individuals which would then lead to the correct charge for the overall structure.