To determine the formal charge on an atom, we need to compare the number of valence electrons an atom has in its neutral state (the number of valence electrons in the free atom) with the number of valence electrons it has in a particular molecule or ion.
In the case of nitrogen (N), it is in group 15 of the periodic table and has 5 valence electrons. To determine the formal charge on the nitrogen atom in a specific molecule or ion, we need to consider the bonding and the lone pair electrons around the nitrogen atom.
Without additional information about the specific molecule or ion containing the nitrogen atom, it is difficult to provide an accurate formal charge value. The formal charge can vary depending on the molecular structure and the distribution of electrons.
Please provide more details about the molecule or ion that contains the nitrogen atom so that I can assist you in determining the formal charge on the nitrogen atom more precisely.