Which of the following best explains why the bonds in ammonia (NH3) are polar covalent?

A. Nitrogen has a greater number of isotopes than hydrogen.
B. Nitrogen has a greater electronegativity value than hydrogen.
C. Nitrogen has a mass number that is 14 times that of hydrogen.
D. Nitrogen has seven neutrons, but hydrogen does not have any neutrons.

A?

1 answer

I don't like any of the choices but B is the best of those listed. Certainly not A.