How do you calculate formal charge from an equation?

1 Answer
Jun 19, 2016

The formal charge of any atom in a molecule can be calculated by the following equation:

#FC = V - N - B/2#

where V is the number of valence electrons of the neutral atom in isolation (in its ground state); N is the number of non-bonding valence electrons on this atom in the molecule; and B is the total number of electrons shared in bonds with other atoms in the molecule.