Ionic Compounds
Practice Test
1.
What kind of ion is iodide (I
-
)?
a.
monatomic anion
b.
monatomic cation
c.
polyatomic anion
d.
polyatomic cation
2.
Why is the calcium ion (Ca
2+
) more stable than the calcium atom (Ca)?
a.
Twenty electrons are more stable than eighteen electrons.
b.
Eighteen electrons are less stable than twenty electrons.
c.
The noble gas configuration is more stable.
d.
The two electrons more than the noble gas configuration is more stable.
3.
_____________ is the force that holds two atoms together.
a.
Fission
b.
Nuclear force
c.
A chemical bond
d.
Glue
4.
Which ion has the electron configuration 1s
2
2s
2
2p
6
3s
2
3p
6
?
a.
Br
-
b.
Cl
-
c.
H
+
d.
F
-
5.
What is the charge on a monatomic ion?
a.
reduction number
b.
mass number
c.
Avogadros number
d.
oxidation number
6.
Which of the following lattice energies represents the strongest force of attraction holding the ions in place?
Lattice Energies of Some Ionic Compounds
Compound
Lattice energy
Compound
Lattice energy
KI
632
KF
808
KBr
671
AgCl
910
RbF
774
NaF
910
NaI
682
LiF
1030
NaBr
732
SrCl2
2142
NaCl
769
MgO
3795
a.
-2142
b.
-769
c.
-632
d.
-910
7.
Whichof the following is a mixture of elements that has metallic properties?
a.
a gas
b.
a pure metal
c.
an alloy
d.
a suspension
8.
How are ionic bonds formed?
a.
loss of electrons by atoms
b.
sharing of electrons between atoms
c.
electrostatic forces between ions
d.
gain of electrons by atoms
9.
If tungsten were not available for use in a lightbulb filament, which of the elements in the table would be the best choice for a substitute?
Melting Points and Boiling Points of Some Metals
Element
Melting point (°C)
Boiling point (°C)
Lithium
180
1347
Tin
232
2623
Aluminum
660
2467
Barium
727
1850
Silver
961
2155
Copper
1083
2570
a.
aluminum
b.
barium
c.
lithium
d.
copper
10.
Which elements can either gain or lose electrons to form stable octets?
a.
transition metals
b.
nonmetals
c.
metalloids
d.
metals
11.
What is the name given to the simplest ratio of ions in an ionic compound?
a.
mole
b.
empirical formula
c.
formula unit
d.
monatomic ion
12.
What is the name given to the energy required to separate one mole of the ions of an ionic compound?
a.
kinetic energy
b.
potential energy
c.
heat energy
d.
lattice energy
13.
Name the pair that contains an incorrect formula.
a.
magnesium hydroxide Mg(OH)
2
b.
iron(II) sulfite FeSO
3
c.
aluminum phosphate AlPO
4
d.
silver carbonate AgCO
3
14.
An ionic compound that will conduct an electric current when it forms an aqueous solution is a(n) _________.
a.
molecular compound
b.
crystal lattice
c.
electrolyte
d.
nonelectrolyte
15.
What forms chemical bonds?
a.
noble gases
b.
inner-level electrons
c.
atomic nuclei
d.
valence electrons
16.
How many electrons are present in the valence level for all noble gases except helium?
a.
7
b.
8
c.
6
d.
9
17.
Which of the following is a correct description of a metallic property?
a.
Metals gain electrons to form anions.
b.
Metals are brittle.
c.
Metals have a dull appearance.
d.
Metals are malleable.
18.
What is the correct name of Fe
2
O
3
?
a.
iron oxide
b.
iron(II) oxide
c.
iron(III) oxide
d.
iron(I) oxide
19.
Why are metals described as having a "sea of electrons"?
a.
The electrons move in waves.
b.
The electrons are wet.
c.
The electrons are fixed to a particular metal atom.
d.
The electrons are free to move between the atoms in a metal.
