Formal Charge is the charge given to an element within a molecule. It assumes that electrons are shared equally between elements, regardless of electronegativity.
Concept #1: Why is formal charge important?
Many Lewis Dot Structures break the octet rule. Formal Charge is used to predict the most correct structure.
Concept #2: The Formal Charge Formula
Whenever using the formal charge formula the three acceptable answers are -1, 0 and +1.
Example #1: Calculate the formal charge for each of the following element designated for each of the following.
The carbon atom in CO
The sulfur atom in SOCl2
Practice: Calculate the formal charge for each of the following element designated in the following compound. a. Both Oxygen atoms.