6.1: Electronegativity and Polarity (Problems)
- Page ID
- 112694
PROBLEM \(\PageIndex{1}\)
Predict which of the following compounds are ionic and which are covalent, based on the location of their constituent atoms in the periodic table:
a. Cl2CO
b. MnO
c. NCl3
d. CoBr2
e. K2S
f. CO
g. CaF2
h. HI
i. CaO
j. IBr
k. CO2
- Answer a
-
covalent
- Answer b
-
ionic
- Answer c
-
covalent
- Answer d
-
ionic
- Answer e
-
ionic
- Answer f
-
covalent
- Answer g
-
ionic
- Answer h
-
covalent
- Answer i
-
ionic
- Answer j
-
covalent
- Answer k
-
covalent
PROBLEM \(\PageIndex{2}\)
Explain the difference between a nonpolar covalent bond, a polar covalent bond, and an ionic bond.
- Answer
-
nonpolar covalent: electronegativity difference is less than 0.4 (nonmetal+nonmetal close together on the periodic table)
polar covalent: electronegativity difference in between 0.4 and 2.0 (nonmetal + nonmental further apart on the periodic table)
ionic: electronegativity difference is above 2.0 (metal + nonmetal)
PROBLEM \(\PageIndex{3}\)
From its position in the periodic table, determine which atom in each pair is more electronegative:
a. Br or Cl
b. N or O
c. S or O
d. P or S
e. Si or N
f. Ba or P
g. N or K
- Answer a
-
Cl
- Answer b
-
O
- Answer c
-
O
- Answer d
-
S
- Answer e
-
N
- Answer f
-
P
- Answer g
-
N
PROBLEM \(\PageIndex{4}\)
From its position in the periodic table, determine which atom in each pair is more electronegative:
a. N or P
b. N or Ge
c. S or F
d. Cl or S
e. H or C
f. Se or P
g. C or Si
- Answer a
-
N
- Answer b
-
N
- Answer c
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F
- Answer d
-
Cl
- Answer e
-
C
- Answer f
-
P
- Answer g
-
C
PROBLEM \(\PageIndex{5}\)
From their positions in the periodic table, arrange the atoms in each of the following series in order of increasing electronegativity:
a. C, F, H, N, O
b. Br, Cl, F, H, I
c. F, H, O, P, S
d. Al, H, Na, O, P
e. Ba, H, N, O, As
- Answer a
-
H, C, N, O, F
- Answer b
-
H, I, Br, Cl, F
- Answer c
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H, P, S, O, F
- Answer d
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Na, Al, H, P, O
- Answer e
-
Ba, H, As, N, O
PROBLEM \(\PageIndex{6}\)
Which is the most polar bond?
C–C; C–H; N–H; O–H; Se–H
- Answer
-
O–H
PROBLEM \(\PageIndex{7}\)
Identify the more polar bond in each of the following pairs of bonds:
a. HF or HCl
b. NO or CO
c. SH or OH
d. PCl or SCl
e. CH or NH
f. SO or PO
g. CN or NN
- Answer a
-
HF
- Answer b
-
CO
- Answer c
-
OH
- Answer d
-
PCl
- Answer e
-
NH
- Answer f
-
PO
- Answer g
-
CN
PROBLEM \(\PageIndex{8}\)
Which of the following molecules or ions contain polar bonds?
a. O3
b. \(\ce{O2^2-}\)
c. \(\ce{NO3-}\)
d. CO2
e. H2S
f. \(\ce{BH4-}\)
g. S8
- Answer
-
c, d, e, f
Contributors
Paul Flowers (University of North Carolina - Pembroke), Klaus Theopold (University of Delaware) and Richard Langley (Stephen F. Austin State University) with contributing authors. Textbook content produced by OpenStax College is licensed under a Creative Commons Attribution License 4.0 license. Download for free at http://cnx.org/contents/85abf193-2bd...a7ac8df6@9.110).
- Adelaide Clark, Oregon Institute of Technology
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