Formal Charge
| Formula / Notation | FC = V - N - B/2 |
|---|---|
| Also Known As | Lewis structure charge, atom charge in molecule, hypothetical charge |
What is Formal Charge?
Formal charge is a hypothetical charge assigned to an atom in a molecule, assuming that electrons in all chemical bonds are shared equally between atoms, regardless of electronegativity. It is used to identify the most stable Lewis structure from multiple resonance structures. The sum of all formal charges in a molecule equals the overall charge of the molecule.
Formula & Notation
Other Names / Synonyms: Lewis structure charge, atom charge in molecule, hypothetical charge
Properties & Characteristics
Uses & Applications
Safety Information
Always consult the SDS/MSDS before handling any chemical. This information is for educational purposes only.
Key Facts
Frequently Asked Questions
Formal charge is a hypothetical charge assigned to an atom in a molecule, assuming that electrons in all chemical bonds are shared equally between atoms, regardless of electronegativity. It is used to identify the most stable Lewis structure from multiple resonance structures. The sum of all formal charges in a molecule equals the overall charge of the molecule.
Drawing and evaluating Lewis structures. Predicting molecular geometry. Comparing resonance structures to find most stable. Understanding reaction mechanisms. Predicting reactivity and nucleophilicity. Teaching chemical bonding concepts.
Theoretical concept — no direct safety concerns. Used in chemical education and computational chemistry.
The formula or notation for Formal Charge is: FC = V - N - B/2