Wildcat Chemistry
Ionic Bonding Test
Part I. True/False
DO NOT
WRITE
ON THIS
TEST!
Indicate whether the statement is true or false.
1. A cation is a negatively charged atom.
2. In an ionic bond, two cations can bond together to form a compound.
3. When an atom gains electrons, it becomes positively charged.
4. Phosphide is the name of the anion formed when phosphorus gains three electrons.
5. Lithide is the name of the cation formed when lithium loses an electron.
6. Metallic elements tend to form cations rather than anions.
7. An ionic bond is an electrostatic force that holds together oppositely charged atoms in a compound.
8. A crystal lattice is a three-dimensional structure formed by positive ions surrounded by negative ions and negative
ions surrounded by positive ions.
9. Because of the number of negative ions packed around each positive ion in a crystal lattice, ionic compounds are
good conductors of electricity and heat in their solid state.
10. According to the electron sea model, metals consist of metallic cations surrounded by delocalized valence electrons.
11. A chemical bond results from the interaction between two nuclei.
12. A sodium ion is more stable than a sodium atom.
Part II. Multiple Choice
Identify the choice that best completes the statement or answers the question.
13.Based on the periodic table shown, elements from columns A and C will combine in which ratio?
a. 1 A: 3 C
c. 3A:1C
b. 1A:1C
d. These elements will not combine.
14.Based on the periodic table shown, elements from columns B and F will combine in which ratio?
a. 1B:2F
c. 2B:3F
b. 1B:1F
d. These elements will not combine.
15.Based on the periodic table shown, elements from columns B and E will combine in which ratio?
a. 2B:3E
c. 3B:2E
b. 3B:1E
d. These elements will not combine.
16. In the equation for the formation of magnesium sulfide shown, which atom gains electrons?
Mg
A
a.
b.
+ S  [Mg]2+ + [S]2B
C
A
B
D
c.
d.
C
D
17. Which is the correct formula for the ionic compound that results from these two atoms?
X
a.
b.
X2Y5
X5Y2
+ Y  ?
c.
d.
X2Y3
X3Y2
18. Which is true of the model of bonding shown in this figure?
a.
b.
c.
d.
Metallic atoms are present in a “sea” of negatively charged atoms.
Valence electrons are able to move easily among the metallic cations.
It results in the substance being very brittle and not easily deformed.
Heat and electricity are easily carried by the cations from one region to another.
19. Which is the charge that results when oxygen becomes an ion?
a. +2
c.
b. -3
d.
+3
-2
20. Group IIIA elements tend to acquire which charge when they form ions?
a. +3
c. +5
b. -5
d. -3
21. Which is true of binary ionic compounds?
a. They consist of only two atoms.
b. They consist of atoms of only two elements.
c. They contain two different anions.
d. They have bonds that share two valence electrons.
22. Which is a physical property of ionic compounds in their solid state?
a. good conductor of electricity
b. weak attractive forces between ions
c. low boiling point
d. high melting point
23. Which is a property of substances that exhibit metallic bonding?
a. high boiling points
c.
b. rigid and brittle
d.
low melting points
poor conductors of electricity
24. Which is the correct formula for the compound formed between beryllium and nitrogen?
a. BeN
c. Be3N2
b. Be3N
d. Be2N3
25. What is the correct formula for the compound formed between magnesium and the phosphate ion?
a. MgPO4
c. Mg3(PO4)2
b. Mg3PO2
d. MgP2O8
26. Which is the correct formula for the compound Manganese (III) Fluoride?
a. MnF
c. MnF3
d. Mn3F3
b. Mn3F
27. Which is the correct formula for the compound Chromium (II) Nitrate?
a. (Cr)2NO3
c. CrNO2
b. Cr2NO3
d. Cr(NO3)2
28. Which is the correct name for the compound FeS?
a. Iron Sulfide
b. Iron (I) Sulfide
c.
d.
Iron (II) Sulfide
Iron (II) Sulfide (II)
29.Which is the correct name for the compound CaClO2?
a. Calcium Chloride
b. Calcium Chloroxide
c.
d.
Calcium Chlorite
Calcium Chlorate
30. Which is the correct name for the compound Na3P?
a. Sodium Phosphide
b. Sodium Phosphite
c.
d.
Sodium Phosphate
Sodium (III) Phosphide
31.Which is the correct name for the compound CoCO3?
a. Carbon Oxygen Carbonate
b. Cobalt (II) Carbonate
c.
d.
Cobalt Carbonate
Cobalt Carbonoxide
32. Which is the correct name for the compound NH4SO4?
a. Nitrogen Hydrogen Sulfate
b. Nitrogen Hydrosulfate
c.
d.
Ammonium (II) Sulfate
Ammonium Sulfate
33. Noble gases have low reactivity because _____.
a. their outermost energy level can accept only one electron.
b. their potential energy is high.
c. their electrons are readily exchanged with atoms of other noble gases.
d. their outermost energy levels are filled.
34. A potassium _____.
a. atom has a stable octet in its outermost energy level.
b. atom will accept an extra electron to look like helium's configuration.
c. atom forms a cation when it loses an electron.
d. ion combines readily with cations.
35. A fluorine atom _____.
a. has a stable octet in its outermost energy level.
b. will accept an extra electron to look like neon's configuration.
c. forms a cation when it gains an electron.
d. combines readily with anions.
36. The salts NaCl and KBr _____.
a. are good conductors of electricity.
b. have positive charges.
c. have the same crystal lattice energy.
d. are held together by ionic bonds.
Part III. Essay Answer as completely as possible.
37. Why do ionic compounds have such high melting points? (2 points)
See examples below.
Covalent Compound Melting Point oC
Ionic Compound
Melting Point oC
CaI2
784
CCl4
-23
MgF2
1261
H2S
-86
NaCl
801
CH4
-182
38. Under the right conditions, ionic substances can conduct electricity very well.
Describe these two conditions and how they allow for conductance. (2 points)
39. Although metals and salts have similar lattice structures, metals make good materials
for electrical wiring and salts do not. Give two reasons why because of the
characteristics of salts, they aren't used instead. (2 points)
40. Explain why potassium and bromine will react together to form a compound with
ionic bonds. Also, be sure to explain what an ionic bond is.(4 points) Hint: Think
about electron configurations and stability.
Ionic Compounds
Answer Section
TRUE/FALSE
1.F
12. T
2. F
3. F
4. T
5. F
6. T
17.D
18.B
7.T
8. T
9. F
10. T
11.F
19.D
20. A
21.B
22.D
29.C
30.A
31.B
32. D
MULTIPLE CHOICE
13.D
14.B
23.A
24.C
15.C
16. B
25.C 26.C
27.D28.C