How would you calculate the formal charge of NH3?

Formal Charge is calculated with the following equation:

Charge = Group Number – (lone electrons + the number of bonds)

One Nitrogen atom = 1 x −3 (nitrogen’s charge) = −3

Three hydrogen atoms = 3 x +1 (hydrogen’s charge) = 3

−3+3=0 (net charge of NH3) the overall charge of the compound NH3 in its most abundant form is neutral. Total Charge = 5 – 3 (bonds to hydrogen) – 2 electrons = 0

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