Chapter 9:
Covalent Bonding
Practice Test
1.
The correct molecular compound name for H
2
O
2
is ________.
a.
hydrogen dioxide
b.
dihydrogen monoxide
c.
dihydrogen dioxide
d.
hydrogen oxide
Hint
2.
Which element has the highest electronegativity?
a.
Ne
b.
O
c.
N
d.
F
Hint
3.
What is the correct name for HBr in an aqueous solution?
a.
hydrobromic acid
b.
bromic acid
c.
hydrogen bromide
d.
bromous acid
Hint
4.
Which element can share only one pair of electrons?
a.
N
b.
C
c.
H
d.
O
Hint
5.
When two or more atoms join together by sharing their outermost electrons, ________.
a.
a mixture is formed
b.
a solution is formed
c.
an ionic compound is formed
d.
a molecular compound is formed
Hint
6.
To determine the number of bonding electron pairs, you must divide the number of electrons available for bonding by _______.
a.
4
b.
3
c.
2
d.
1
Hint
7.
Which of the following atoms will be an exception to the octet rule in a molecule?
a.
C
b.
O
c.
N
d.
B
Hint
8.
Which compound consists of nonpolar molecules?
a.
PH
3
b.
SiH
4
c.
H
2
S
d.
AsH
3
Hint
9.
How many lone pairs of electrons are present in a molecule of water?
a.
1
b.
2
c.
4
d.
3
Hint
10.
What is the formula for the binary compound of aluminum and nitrogen?
a.
Al
2
N
2
b.
AlN
2
c.
AlN
d.
Al
2
N
Hint
11.
When a hydrogen atom is part of a molecular structure, it is always a ________ atom.
a.
terminal
b.
central
c.
ionic
d.
1–
Hint
12.
Single covalent bonds are also referred to as ___________.
a.
delta bonds
b.
sigma bonds
c.
pi bonds
d.
hydrogen bonds
Hint
13.
What is the chemical formula for dintrogen hexoxide?
a.
N
2
O
6
b.
NO
5
c.
NO
2
d.
N
2
O
5
Hint
14.
The phosphorus pentachloride molecule is nonpolar and contains no unshared electron pairs on the phosphorus atom. What are all the possible bond angles in this molecule?
a.
90° and 180°
b.
180°
c.
90°, 120°, and 180°
d.
120°
Hint
15.
The Lewis dot formula for I2 shows a _________.
a.
single ionic bond
b.
total of 8 × 2 = 16 electrons
c.
double covalent bond
d.
single covalent bond
Hint
16.
What hybridization is present in an octahedral molecular geometry?
a.
sp
3
d
2
b.
Sp
2
c.
sp
3
d
d.
sp
3
Hint
17.
What is the charge on the simple monatomic ion that sulfur forms?
a.
2-
b.
1+
c.
2+
d.
1–
Hint
18.
Side—on overlaps of atomic orbitals are also referred to as ___________.
a.
delta bonds
b.
sigma bonds
c.
hydrogen bonds
d.
pi bonds
Hint
19.
Which Lewis dot structure is incorrect?
a.
b.
c.
d.
Hint
20.
In the compound H
2
SO
4
, which element will be the central atom in the molecular structure?
a.
both S and O
b.
O
c.
H
d.
S
Hint
