Are the bonds in each of the following substances ionic, non-polar covalent, or polar covalent? Arrange the substances with polar covalent bonds in order of increasing bond polarity:

Are the bonds in each of the following substances ionic, non-polar
covalent, or polar covalent? Arrange the substances with polar covalent bonds in order
of increasing bond polarity: (SO4)2-, (NO2)-
, PH3, NF3, CH2Cl2