Worksheet-Polarity of Bonds
I. Determine the type of bond (ionic, polar covalent,
or non-polar covalent ) that will form between
atoms of the following elements and show the
polarity of the bond if it is polar covalent.
a. Ca and Cl
b. C and S
c. Mg and F
d. N and O
e. H and O
f. S and O
II. The bonds between the following pairs of
elements are covalent. Arrange them according to
polarity, naming the most polar bond first.
a. H—Cl
b. H—C
c. H—F
d. H—O
e. H—H
f. S—Cl
III. Using the table of electronegativities from your
Periodic table, calculate the EN difference for the
atoms that are bonded in the following molecules.
Then tell whether the bond is nonpolar covalent,
polar covalent, or ionic. Tell which atom has the
greater share of the bonding electrons. In your
drawing, show which atom is partially positive or
partially negative if it is a polar covalent bond.
Molecule
PCl3
NH3
H2O
EN
Difference
Type
of
Bond
Atom
with
greater
EN
Lewis
Structure
CaO
H2S
HCl
Br2
Na2S
H2O2
HCN
NI3
SO3
O2
(SO4)2-
(PO4)3-