Chapter 9:
Chemical Bonding
Practice Test
1.
A chemical bond that results from a shared pool of valence electrons is called a ____________ bond.
a.
metallic
b.
polar covalent
c.
ionic
d.
directional
Hint
2.
The type of analysis based on the movements of a stationary phase and a mobile phase is called _____________.
a.
titration
b.
chromatography
c.
photography
d.
phase movement
Hint
3.
When strontium atoms react with oxygen atoms, they form __________ bonds.
a.
triple
b.
covalent
c.
polar covalent
d.
ionic
Hint
4.
Atoms that share electrons form __________ bonds.
a.
ionic
b.
quartets
c.
quantitative
d.
covalent
Hint
5.
Chemical bonding results in ________________.
a.
increased stability
b.
decreased stability
c.
longer bond lengths
d.
lower density
Hint
6.
Water molecules stick together to form droplets because of their ___________.
a.
volumes
b.
masses
c.
polarities
d.
covalencies
Hint
7.
Atoms that transfer electrons form __________ bonds.
a. ionic
b. dative
c. coordinate
d. covalent
Hint
8.
Covalent bonding results when this element reacts with fluorine.
a.
potassium
b.
lithium
c.
oxygen
d.
iron
Hint
9.
The arrangement of electron pairs around each of the two carbon atoms in the ethene molecule, C
2
H
4
, is best described as _________________.
a.
trigonal planar
b.
tetrahedral
c.
square planar
d.
linear
Hint
10.
In general, electronegativity ___________ atomic number within a period.
a.
remains constant with
b.
increases with
c.
is inversely proportional to
d.
decreases with
Hint
11.
The CCl
4
molecule is _________________.
a.
octahedral and polar
b.
tetrahedral and nonpolar
c.
linear and nonpolar
d.
tetrahedral and polar
Hint
12.
Two atoms that share six electrons are said to be joined by a __________ bond.
a.
single
b.
hexyl
c.
double
d.
triple
Hint
13.
The center of positive charge in the H
2
O molecule lies ______________________.
a.
between the two hydrogen atoms
b.
in the geometric center of the molecule
c.
on one of the hydrogen atoms
d.
on the oxygen atom
Hint
14.
What is the most stable arrangement of three electron pairs attached to a central atom?
a.
trigonal planar
b.
pyramidal
c.
hexagonal
d.
tetrahedral
Hint
15.
The CO
2
molecule is _____________.
a.
linear
b.
trigonal planar
c.
pyramidal
d.
hexagonal
Hint
16.
_____________ is the measure of an atom's ability to attract electrons in a bond.
a.
Ionic radius
b.
Shielding
c.
melting point
d.
Electronegativity
Hint
17.
In general, _________ are malleable and ductile.
a.
nonmetals
b.
noble gases
c.
metalloids
d.
metals
Hint
18.
___________ sharing of electrons results in ionic bonding.
a.
Highly unequal
b.
Equal
c.
Electronegative
d.
Slightly unequal
Hint
19.
The shielding effect is the tendency of inner energy level electrons to block the attraction of the nucleus for ________________.
a.
protons
b.
other atoms
c.
neutrons
d.
valence electrons
Hint
20.
The arrangement of electron pairs around the nitrogen atom in the ammonia molecule, NH
3
, is best described as _______________.
a.
linear
b.
square planar
c.
pyramidal
d.
tetrahedral
Hint
