3-2 Relate electronegativity and bond polarity

3-2-1. Which pair of atoms would form a bond where the polarity is directed towards the first atom?
A. C and C, B. H and F, C. O and C, D. I and Cl

3-2-2. Which pair of atoms would form a polar covalent but essentially nonpolar bond?
A. N and N, B. H and C, C. Na and Cl, D. Be and I

3-2-ALD. Choose the diatomic molecule/ion that would have the least polar bond.
A. carbon monoxide
B. hydrofluoric acid
C. nitrogen
D. the cyanide ion