The BF3 molecule is nonpolar; whereas the NF: molecule is polar: Which of the following statements accounts for the difference in polarity of the two molecules? In NFs, each F is joined to N with multiple bonds, whereas in BF3 , each F is joined to B with single bonds. b N - F bonds are polar; whereas B ~ F bonds are nonpolar: NFz is an ionic compound; whereas BFz is molecular compound. d_ Unlike BF3, NFz has a nonplanar geometry due to an unshared pair of electrons on the N atom: