Here we must determine the formal charge of the nitrogen atom found within the ammonia molecule, which is NH3. All right, So we need formal charge, which is just going to abbreviate it. FC equals valence electrons, which is equal to the group number of the element.
Nitrogen is in Group 5A, so it's 5 minus the bonds that it's making. It is making 123 bonds plus its non bonding electrons, the electrons that are not participating in bonding, so they're counted individually. This would be 1/2 nonbonding electrons, so this would be
5 - ( 3 + 2 ), so it would be
5 - 5.
So we'd have a formal charge of 0 for the nitrogen atom within ammonia. This means that option C would be our correct answer.