Is NH4+ a polar or nonpolar bond?
2 answers
Each N-H bond is polar because N and H don't have the same electronegativity. H is about 2.1 and N is about 3.0. So I would classify each of the 4 N-H bonds as polar covalent. A related question is does NH4^+ have a dipole moment due to the polar bonds. No, it does not.
nonpolar