## Chemistry and Chemical Reactivity (9th Edition)

From the table 8-10 data: a) $\overrightarrow{C-O}$, $\overrightarrow{C-N}$, the oxygen bond is more polar because the difference in electronegativity is greater. b) $\overrightarrow{P-Br}$, $\overrightarrow{P-Cl}$, the chlorine bond is more polar because the difference in electronegativity is greater. c) $\overrightarrow{B-O}$, $\overrightarrow{B-S}$, the oxygen bond is more polar because the difference in electronegativity is greater. d) $\overrightarrow{B-F}$, $\overrightarrow{B-I}$, the fluorine bond is more polar because the difference in electronegativity is greater.