Question

Which of these formulas contains the most polar bond?
(1) H–Br (3) H–F(2) H–Cl (4) H–I

Answer 1

The answer is H—F. Fluorine is the most electronegative of the four halogens (and, in fact, of all the elements), so it does the best job of gathering the shared electrons to itself. Therefore, the bond with F is the most polar