Chapter 8:
Ionic Compounds
Practice Test
1.
An ionic compound that will conduct an electric current when it forms an aqueous solution is a(n) _________.
a.
electrolyte
b.
molecular compound
c.
crystal lattice
d.
nonelectrolyte
Hint
2.
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.
Hint
3.
Why is the calcium ion (Ca
2+
) more stable than the calcium atom (Ca)?
a.
Eighteen electrons are less stable than twenty electrons.
b.
The noble gas configuration is more stable.
c.
Twenty electrons are more stable than eighteen electrons.
d.
The two electrons more than the noble gas configuration is more stable.
Hint
4.
Which one of the following classifications of ions contains an error?
a.
magnesium----------Mg
2+
-----monatomic-----cation
b.
carbonate-----CO
3
2-
-----polyatomic-----anion
c.
ammonium-----NH
4
+
-----polyatomic-----cation
d.
hydroxide-----OH
-
-----monatomic-----anion
Hint
5.
What is a negatively charged ion called?
a.
molecule
b.
cation
c.
nucleus
d.
anion
Hint
6.
How are ionic bonds formed?
a.
loss of electrons by atoms
b.
gain of electrons by atoms
c.
sharing of electrons between atoms
d.
electrostatic forces between ions
Hint
7.
Which elements can either gain or lose electrons to form stable octets?
a.
metalloids
b.
nonmetals
c.
transition metals
d.
metals
Hint
8.
How many ions are produced when one unit of sodium phosphate
(Na
3
PO
4
) dissolves in water?
a.
4
b.
2
c.
8
d.
3
Hint
9.
How many electrons are present in the valence level for all noble gases except helium?
a.
6
b.
8
c.
7
d.
9
Hint
10.
A binary compound is a ___________.
a.
compound made of polyatomic ions
b.
compound made of three types of atoms
c.
compound made of one type of atom
d.
compound made of two types of atoms
Hint
11.
What is the name of the aqueous solution of H
2
SO
4
?
a.
hydrogen persulfate
b.
sulfurous acid
c.
hydrogen persulfide
d.
sulfuric acid
Hint
12.
What is the name given to the energy required to separate one mole of the ions of an ionic compound?
a.
lattice energy
b.
potential energy
c.
kinetic energy
d.
heat energy
Hint
13.
Which ion has the electron configuration
1s
2
2s
2
2p
6
3s
2
3p
6
?
a.
Cl
-
b.
H
+
c.
F
-
d.
Br
-
Hint
14.
_____________ is the force that holds two atoms together.
a.
Glue
b.
A chemical bond
c.
Fission
d.
Nuclear force
Hint
15.
Name the pair that contains an incorrect formula.
a.
iron(II) sulfite-----FeSO NH
3
Br
b.
silver carbonate-----AgCO NH
3
Br
c.
aluminum phosphate-----AlPO NH
4
Br
d.
magnesium hydroxide-----Mg(OH) NH
2
Br
Hint
16.
What is the formula for ammonium bromide?
a.
NH
3
Br
b.
NH
4
Br
2
c.
(NH
4
)
2
Br
d.
NH
4
Br
Hint
17.
Sulfate (SO
4
2-
) is a ____________.
a.
monatomic cation
b.
polyatomic cation
c.
monatomic anion
d.
polyatomic anion
Hint
18.
What kind of ion is iodide (I
-
)?
a.
monatomic anion
b.
polyatomic cation
c.
polyatomic anion
d.
monatomic cation
Hint
19.
Which of the following is a mixture of elements that has metallic properties?
a.
a gas
b.
a pure metal
c.
a suspension
d.
an alloy
Hint
20.
What is the correct name of Fe
2
O
3
?
a.
iron(II) oxide
b.
iron(III) oxide
c.
iron(I) oxide
d.
iron oxide
Hint
