How do you calculate the formal charge of #NH_3#?
Ammonia is a neutral gas, and thus has a formal charge of zero. Moreover its constituent atoms are each formally neutral.
A useful comparison is to consider the formal neutral charge of ammonia versus ammonium ion,
Around nitrogen in ammonia there 2 electrons from the lone pair, 3 electrons from the
When ammonium forms from ammonia, we write:
Of course, here, mass and charge are conserved, as they must be. But in ammonium ion, nitrogen has a half share only of the 8 electrons that comprise the
Are you happy with this treatment?