Which of the species that have polar covalent bonds.?
When your looking for a polar covalent bond you are looking for a super electronegative element like O, N, F, or Cl bonded to another nonmetal that is not so electronegative so you have a big difference in electronegativity which will produce a polar bond. Polar bond just means it has a partial positive end and a partial negative end, and that shared pair of electrons will spend most of its time around the super electronegative element. 1) has Cl so there are polar bonds 2) Here there is no difference in electronegativity because F is bonded to itself so it is nonpolar 3) once again no difference in electronegativity because O is bonded to itself 4) this is a metal bonded to a nonmetal so it is ionic.
