Use electronegativity values to classify the bond between each of the following pairs of atoms as nonpolar covalent, polar covalent, or ionic:
a. Sr and Cl b. C and S c. O and Br
a. An electronegativity difference of 2.0 (Cl 3.0 – Sr 1.0) makes this an ionic bond.
b. An electronegativity difference of 0.0 (C 2.5 – S 2.5) makes this a nonpolar covalent bond.
c. An electronegativity difference of 0.7 (O 3.5 – Br 2.8) makes this a polar covalent bond.