NaI - Polar (large difference in electronegativity because of distance from each other on the periodic table) H2 - Nonpolar (its the same element so it cancels out and it is nonpolar) Solution NaI - Polar (large difference in electronegativity because of distance from each other on the periodic table) H2 - Nonpolar (its the same element so it cancels out and it is nonpolar).