Chapter 9:
Chemical Bonding
Practice Test
1.
The CO molecule is _____________________.
a.
tetrahedral and nonpolar
b.
linear and nonpolar
c.
trigonal planar and polar
d.
linear and polar
Hint
2.
_____________ is the measure of an atom's ability to attract electrons in a bond.
a.
Electronegativity
b.
melting point
c.
Shielding
d.
Ionic radius
Hint
3.
Atoms that share electrons form __________ bonds.
a.
quantitative
b.
ionic
c.
quartets
d.
covalent
Hint
4.
Water molecules stick together to form droplets because of their ___________.
a.
covalencies
b.
polarities
c.
masses
d.
volumes
Hint
5.
What is the most stable arrangement of three electron pairs attached to a central atom?
a.
pyramidal
b.
tetrahedral
c.
trigonal planar
d.
hexagonal
Hint
6.
The shielding effect is the tendency of inner energy level electrons to block the attraction of the nucleus for ________________.
a.
protons
b.
valence electrons
c.
other atoms
d.
neutrons
Hint
7.
Atoms that transfer electrons form __________ bonds.
a. dative
b. ionic
c. covalent
d. coordinate
Hint
8.
A chemical bond that results from a shared pool of valence electrons is called a ____________ bond.
a.
metallic
b.
ionic
c.
directional
d.
polar covalent
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.
linear
b.
trigonal planar
c.
tetrahedral
d.
square planar
Hint
10.
An arrow points in the direction of the _______________ of a polar covalent molecule.
a.
negative end
b.
bottom
c.
center
d.
positive end
Hint
11.
Two atoms that share six electrons are said to be joined by a __________ bond.
a.
triple
b.
hexyl
c.
double
d.
single
Hint
12.
The arrangement of electron pairs around the nitrogen atom in the ammonia molecule, NH
3
, is best described as _______________.
a.
square planar
b.
tetrahedral
c.
pyramidal
d.
linear
Hint
13.
In general, electronegativity ___________ atomic number within a period.
a.
is inversely proportional to
b.
remains constant with
c.
decreases with
d.
increases with
Hint
14.
The type of analysis based on the movements of a stationary phase and a mobile phase is called _____________.
a.
chromatography
b.
phase movement
c.
titration
d.
photography
Hint
15.
When strontium atoms react with oxygen atoms, they form __________ bonds.
a.
ionic
b.
covalent
c.
polar covalent
d.
triple
Hint
16.
The center of positive charge in the H
2
O molecule lies ______________________.
a.
on the oxygen atom
b.
between the two hydrogen atoms
c.
in the geometric center of the molecule
d.
on one of the hydrogen atoms
Hint
17.
KF is a/an _______________ formula, which shows the ratio of potassium and fluoride ions in crystalline potassium fluoride.
a.
covalent
b.
empirical
c.
double
d.
molecular
Hint
18.
The CO
2
molecule is _____________.
a.
linear
b.
trigonal planar
c.
hexagonal
d.
pyramidal
Hint
19.
Chemical bonding results in ________________.
a.
lower density
b.
decreased stability
c.
longer bond lengths
d.
increased stability
Hint
20.
The boiling point of methane, CH
4
, is ___________ than that of water.
a.
much higher
b.
slightly higher
c.
much lower
d.
slightly higher
Hint
