Question

Which of the following molecules has a nonpolar covalent bond?

A. H–Br
B. H–Cl
C. H–F
D. H–H

Answer 1

D. H-H

With the other 3, one atom is more electronegative, drawing the electrons closer to it and making one side slightly positive, making it polar. With H - H, though, both atoms are the same, so the molecules are shared evenly and it is nonpolar.