Unit 2 Review Quizzes:
CHAPTER 1 QUIZ
4. The more energy that particles have
A. the faster they move
B. the slower they move
C. the higher the mass of the object
D. the more likely they are to form a solid
5. Which term describes the temperature at which a solid turns to a liquid?
A. boiling point
B. melting point
C. condensation point
D. phase change
6. Which statement is part of the kinetic molecular theory?
A. Energy makes particles move.
B. Atoms contain protons.
C. Density is a property of matter.
D. all of the above
7. Why do materials expand when heated?
A. The particles in the material get larger.
B. The particles in the material move faster, increasing spaces between them.
C. The particles get larger and increase the spacing between them.
D. The material melts.
8. J.J. Thomson discovered that all atoms contain particles that later became known as
electrons. What did this discovery make it possible to conclude about atoms?
A. All atoms are negatively charged.
B. All atoms are identical to all other atoms.
C. All atoms are composed of a combination of subatomic particles.
D. All atoms conduct electricity.
9. Which best describes the nucleus?
A. contains protons and electrons; electrically neutral
B. contains protons and electrons; positively charged
C. contains protons and neutrons; positively charged
D. contains neutrons and electrons; negatively charged
10. Which best describes an atom?
A. electrically neutral
B. positively charged
C. negatively charged
D. positively or negatively charged
Match the Term on the left with the best Descriptor on the right.
Each Descriptor may be used only once.
Term Descriptor
_____ 11. nucleus
_____ 12. electron
_____ 13. conductive
_____ 14. density
_____ 15. neutron
_____ 16. malleable
A. a subatomic particle with a charge of zero
B. dense part of an atom
C. able to be drawn into a wire
D. able to transmit heat or electricity
E. occupies an energy level surrounding the nucleus
F. change in state from liquid to gas
G. able to be hammered into a sheet
H. ratio of mass to volume
I. a measure of hardness
Short Answer Questions
17. Provide one good reason for why we have each of the following safety rules.
(a) Always work under supervision and only on approved activities.
__________________________________________________________________________
__________________________________________________________________________
(b) Wear your safety eyewear in the lab as long as any chemicals are still being used, even if
you are finished your own work.
__________________________________________________________________________
__________________________________________________________________________
(c) Do not eat, drink, or chew gum in the lab.
__________________________________________________________________________
__________________________________________________________________________
18. (a) Dalton’s atomic theory says that all matter is made of small particles called atoms.
Use Dalton’s theory to explain why a piece of copper cannot be turned into piece of
gold.
__________________________________________________________________________
__________________________________________________________________________
(b) Rutherford’s model of the atom resulted from an experiment in which alpha particles
were made to pass through a thin gold sheet. Most alpha particles passed straight
through, but some were deflected. Explain what Rutherford was able to conclude from
this about the composition of atoms.
__________________________________________________________________________
__________________________________________________________________________
(c) Bohr studied the results of experiments on the light released by gaseous samples of
atoms, such as those of hydrogen. What was he able to conclude from this about the
way electrons exist in atoms?
__________________________________________________________________________
__________________________________________________________________________
19. (a) Where is 99.99% of the mass in an atom located?
__________________________________________________________________________
(b) Which particles in an atom occupy 99.99% of the volume of the atom?
__________________________________________________________________________
(c) Where is all of the positive charge in an atom located?
__________________________________________________________________________
CHAPTER 1 QUIZ
4. The more energy that particles have
A. the faster they move
B. the slower they move
C. the higher the mass of the object
D. the more likely they are to form a solid
5. Which term describes the temperature at which a solid turns to a liquid?
A. boiling point
B. melting point
C. condensation point
D. phase change
6. Which statement is part of the kinetic molecular theory?
A. Energy makes particles move.
B. Atoms contain protons.
C. Density is a property of matter.
D. all of the above
7. Why do materials expand when heated?
A. The particles in the material get larger.
B. The particles in the material move faster, increasing spaces between them.
C. The particles get larger and increase the spacing between them.
D. The material melts.
8. J.J. Thomson discovered that all atoms contain particles that later became known as
electrons. What did this discovery make it possible to conclude about atoms?
A. All atoms are negatively charged.
B. All atoms are identical to all other atoms.
C. All atoms are composed of a combination of subatomic particles.
D. All atoms conduct electricity.
9. Which best describes the nucleus?
A. contains protons and electrons; electrically neutral
B. contains protons and electrons; positively charged
C. contains protons and neutrons; positively charged
D. contains neutrons and electrons; negatively charged
10. Which best describes an atom?
A. electrically neutral
B. positively charged
C. negatively charged
D. positively or negatively charged
Match the Term on the left with the best Descriptor on the right.
Each Descriptor may be used only once.
Term Descriptor
_____ 11. nucleus
_____ 12. electron
_____ 13. conductive
_____ 14. density
_____ 15. neutron
_____ 16. malleable
A. a subatomic particle with a charge of zero
B. dense part of an atom
C. able to be drawn into a wire
D. able to transmit heat or electricity
E. occupies an energy level surrounding the nucleus
F. change in state from liquid to gas
G. able to be hammered into a sheet
H. ratio of mass to volume
I. a measure of hardness
Short Answer Questions
17. Provide one good reason for why we have each of the following safety rules.
(a) Always work under supervision and only on approved activities.
__________________________________________________________________________
__________________________________________________________________________
(b) Wear your safety eyewear in the lab as long as any chemicals are still being used, even if
you are finished your own work.
__________________________________________________________________________
__________________________________________________________________________
(c) Do not eat, drink, or chew gum in the lab.
__________________________________________________________________________
__________________________________________________________________________
18. (a) Dalton’s atomic theory says that all matter is made of small particles called atoms.
Use Dalton’s theory to explain why a piece of copper cannot be turned into piece of
gold.
__________________________________________________________________________
__________________________________________________________________________
(b) Rutherford’s model of the atom resulted from an experiment in which alpha particles
were made to pass through a thin gold sheet. Most alpha particles passed straight
through, but some were deflected. Explain what Rutherford was able to conclude from
this about the composition of atoms.
__________________________________________________________________________
__________________________________________________________________________
(c) Bohr studied the results of experiments on the light released by gaseous samples of
atoms, such as those of hydrogen. What was he able to conclude from this about the
way electrons exist in atoms?
__________________________________________________________________________
__________________________________________________________________________
19. (a) Where is 99.99% of the mass in an atom located?
__________________________________________________________________________
(b) Which particles in an atom occupy 99.99% of the volume of the atom?
__________________________________________________________________________
(c) Where is all of the positive charge in an atom located?
__________________________________________________________________________
CHAPTER 2 QUIZ
1. Approximately how many elements have been discovered?
A. three
B. 35
C. 100
D. 300
2. Name two metals that are not silver coloured.
A. sulphur and chlorine
B. copper and gold
C. copper and chlorine
D. sulphur and gold
3. Which of the following is a metalloid?
A. sodium
B. sulphur
C. silicon
D. strontium
4. What is a period in the Periodic Table?
A. a vertical column
B. a horizontal row
C. a family of elements with similar properties
D. a group of elements all of which have the same number of valence electrons
5. What do the noble gases He and Kr have in common?
A. The same number of electrons
B. The same number of valence electrons
C. Filled valence energy levels
D. Both gases will make a balloon tend to float.
6. How is the periodic table arranged?
A. by atomic mass and chemical properties
B. by ion charge and atomic mass
C. by ion charge and atomic number
D. by atomic number and chemical properties
7. Which family of elements contains a solid, a liquid, and a gas at room temperature?
A. Group 1
B. Group 2
C. Group 17
D. Group 18
8. Which phrase is correct for a Bohr model of a metal ion?
A. more protons than electrons
B. more electrons than protons
C. equal numbers of protons and electrons
D. equal number of neutrons and protons
9. Which best describes the alkaline earth metal family?
A. family of metals that is magnetic
B. family of metals used to make coins
C. the most reactive family of metals
D. family whose elements have two valence electrons
10. Which best describes an element?
A. a pure substance that cannot be broken down or separated into simpler substances
B. a pure substance that can be decomposed further by physical means
C. a mixture of different kinds of atoms, with different numbers of protons
D. a family of substances all of which have different but similar properties
Match the Term on the left with the best Descriptor on the right.
Each Descriptor may be used only once.
Term Descriptor
_____ 11. atomic mass
_____ 12. noble gases
_____ 13. atomic number
_____ 14. Bohr model
_____ 15. metalloid
_____ 16. alkali metal
A. a family of chemically reactive elements
B. the number of protons in an atom
C. contain the element fluorine
D. has properties of both metals and non-metals
E. compares the inside of an atom to a raisin bun
F. the mass of an average atom of an element
G. family of chemically unreactive gases
H. shows the arrangement of electrons in an atom
Short Answer Questions
17. List any four types of information usually recorded on a periodic table in addition to the
element’s name.
_____________________________________________________________________________
_____________________________________________________________________________
18. Calcium is atomic number is 20.
(a) Draw a simple Bohr diagram showing the number of electrons in each energy level of a
calcium atom.
(b) Draw a simple Bohr diagram showing the number of electrons in each energy level of
a calcium ion, Ca2+.
19. List four properties of alkali metal elements that distinguish them (make them different)
from iron.
_____________________________________________________________________________
_____________________________________________________________________________
20. (a) What is a valence electron?
__________________________________________________________________________
__________________________________________________________________________
(b) How are valence electrons related to chemical families?
__________________________________________________________________________
__________________________________________________________________________
(c) Do non-metals tend to gain electrons or lose electrons as they form ions?
__________________________________________________________________________
__________________________________________________________________________
1. Approximately how many elements have been discovered?
A. three
B. 35
C. 100
D. 300
2. Name two metals that are not silver coloured.
A. sulphur and chlorine
B. copper and gold
C. copper and chlorine
D. sulphur and gold
3. Which of the following is a metalloid?
A. sodium
B. sulphur
C. silicon
D. strontium
4. What is a period in the Periodic Table?
A. a vertical column
B. a horizontal row
C. a family of elements with similar properties
D. a group of elements all of which have the same number of valence electrons
5. What do the noble gases He and Kr have in common?
A. The same number of electrons
B. The same number of valence electrons
C. Filled valence energy levels
D. Both gases will make a balloon tend to float.
6. How is the periodic table arranged?
A. by atomic mass and chemical properties
B. by ion charge and atomic mass
C. by ion charge and atomic number
D. by atomic number and chemical properties
7. Which family of elements contains a solid, a liquid, and a gas at room temperature?
A. Group 1
B. Group 2
C. Group 17
D. Group 18
8. Which phrase is correct for a Bohr model of a metal ion?
A. more protons than electrons
B. more electrons than protons
C. equal numbers of protons and electrons
D. equal number of neutrons and protons
9. Which best describes the alkaline earth metal family?
A. family of metals that is magnetic
B. family of metals used to make coins
C. the most reactive family of metals
D. family whose elements have two valence electrons
10. Which best describes an element?
A. a pure substance that cannot be broken down or separated into simpler substances
B. a pure substance that can be decomposed further by physical means
C. a mixture of different kinds of atoms, with different numbers of protons
D. a family of substances all of which have different but similar properties
Match the Term on the left with the best Descriptor on the right.
Each Descriptor may be used only once.
Term Descriptor
_____ 11. atomic mass
_____ 12. noble gases
_____ 13. atomic number
_____ 14. Bohr model
_____ 15. metalloid
_____ 16. alkali metal
A. a family of chemically reactive elements
B. the number of protons in an atom
C. contain the element fluorine
D. has properties of both metals and non-metals
E. compares the inside of an atom to a raisin bun
F. the mass of an average atom of an element
G. family of chemically unreactive gases
H. shows the arrangement of electrons in an atom
Short Answer Questions
17. List any four types of information usually recorded on a periodic table in addition to the
element’s name.
_____________________________________________________________________________
_____________________________________________________________________________
18. Calcium is atomic number is 20.
(a) Draw a simple Bohr diagram showing the number of electrons in each energy level of a
calcium atom.
(b) Draw a simple Bohr diagram showing the number of electrons in each energy level of
a calcium ion, Ca2+.
19. List four properties of alkali metal elements that distinguish them (make them different)
from iron.
_____________________________________________________________________________
_____________________________________________________________________________
20. (a) What is a valence electron?
__________________________________________________________________________
__________________________________________________________________________
(b) How are valence electrons related to chemical families?
__________________________________________________________________________
__________________________________________________________________________
(c) Do non-metals tend to gain electrons or lose electrons as they form ions?
__________________________________________________________________________
__________________________________________________________________________
CHAPTER 3 QUIZ
Note: A periodic table and an ion chart are required for this quiz.
1. Which of the following is an ionic compound?
A. P4
B. PCl3
C. P4O10
D. Na3PO4
2. Which of the following is a compound?
I. CO3
II. CO2
III. HCO3
IV. O2
A. II only
B. I and III only
C. II and IV only
D. I, II, and III only
3. Consider the following formula: Na2CO3.
What is the ratio of positive to negative ions represented by this formula?
A. 2:3
B. 2:1
C. 3:2
D. 2:1:3
4. What is the formula for aluminum hydroxide?
A. AlOH
B. AlOH3
C. Al3(OH)
D. Al(OH)3
5. Which terms correctly describe CH3COOÅ| ?
I. ion
II. multivalent
III. polyatomic
IV. compound
A. I and II
B. III and IV
C. II and IV
D. I and III
6. What is the name of the metal ion in Fe2S3?
A. iron
B. iron(II)
C. iron(III)
D. sulphide
7. What is the name of Na2CO3?
A. sodium carbonate
B. sodium carbon oxide
C. sodium carbide
D. sodium carbon oxygen
8. What is the name of PbS2?
A. lead sulphide
B. lead(II) sulphide
C. lead(IV) sulphide
D. lead(II) sulphate
9. How many atoms in total are represented by the formula (NH4)3PO4?
A. 11
B. 13
C. 17
D. 20
10. An explosive device is used to blast rock for the construction of a new highway. Which set
of terms describes the explosive device?
A. physical change and endothermic
B. physical change and exothermic
C. chemical change and endothermic
D. chemical change and exothermic
Match the Term on the left with the best Descriptor on the right.
Each Descriptor may be used only once.
Term Descriptor
_____ 11. ionic lattice
_____ 12. reactant
_____ 13. molecule
_____ 14. ionic compound
_____ 15. multivalent metal
_____ 16. polyatomic ion
A. refers to metal and a non-metal chemically
bonded
B. highly ordered array of ions
C. non-metal that has a negative charge
D. ion made of several atoms joined together by
covalent bonds
E. may form a positive ion in more than one
way
F. a group of atoms joined by covalent bonds
G. material that is made during a chemical
reaction
H. the starting material in a chemical reaction
Short Answer Questions
17. Consider the polyatomic ion PO4
3Å|.
(a) How is PO4
3Å| like a molecule?
__________________________________________________________________________
__________________________________________________________________________
(b) How is PO4 like an ion?
__________________________________________________________________________
__________________________________________________________________________
18. Write the formula:
(a) magnesium nitride _________________
(b) nickel(III) fluoride _________________
(c) ammonium sulphate _________________
19. Write the name:
(a) Sr3P2 __________________________________
(b) V2O5 __________________________________
(c) Cs2Cr2O7 __________________________________
20. What is the difference between a chemical change and a physical change?
_____________________________________________________________________________
_____________________________________________________________________________
Note: A periodic table and an ion chart are required for this quiz.
1. Which of the following is an ionic compound?
A. P4
B. PCl3
C. P4O10
D. Na3PO4
2. Which of the following is a compound?
I. CO3
II. CO2
III. HCO3
IV. O2
A. II only
B. I and III only
C. II and IV only
D. I, II, and III only
3. Consider the following formula: Na2CO3.
What is the ratio of positive to negative ions represented by this formula?
A. 2:3
B. 2:1
C. 3:2
D. 2:1:3
4. What is the formula for aluminum hydroxide?
A. AlOH
B. AlOH3
C. Al3(OH)
D. Al(OH)3
5. Which terms correctly describe CH3COOÅ| ?
I. ion
II. multivalent
III. polyatomic
IV. compound
A. I and II
B. III and IV
C. II and IV
D. I and III
6. What is the name of the metal ion in Fe2S3?
A. iron
B. iron(II)
C. iron(III)
D. sulphide
7. What is the name of Na2CO3?
A. sodium carbonate
B. sodium carbon oxide
C. sodium carbide
D. sodium carbon oxygen
8. What is the name of PbS2?
A. lead sulphide
B. lead(II) sulphide
C. lead(IV) sulphide
D. lead(II) sulphate
9. How many atoms in total are represented by the formula (NH4)3PO4?
A. 11
B. 13
C. 17
D. 20
10. An explosive device is used to blast rock for the construction of a new highway. Which set
of terms describes the explosive device?
A. physical change and endothermic
B. physical change and exothermic
C. chemical change and endothermic
D. chemical change and exothermic
Match the Term on the left with the best Descriptor on the right.
Each Descriptor may be used only once.
Term Descriptor
_____ 11. ionic lattice
_____ 12. reactant
_____ 13. molecule
_____ 14. ionic compound
_____ 15. multivalent metal
_____ 16. polyatomic ion
A. refers to metal and a non-metal chemically
bonded
B. highly ordered array of ions
C. non-metal that has a negative charge
D. ion made of several atoms joined together by
covalent bonds
E. may form a positive ion in more than one
way
F. a group of atoms joined by covalent bonds
G. material that is made during a chemical
reaction
H. the starting material in a chemical reaction
Short Answer Questions
17. Consider the polyatomic ion PO4
3Å|.
(a) How is PO4
3Å| like a molecule?
__________________________________________________________________________
__________________________________________________________________________
(b) How is PO4 like an ion?
__________________________________________________________________________
__________________________________________________________________________
18. Write the formula:
(a) magnesium nitride _________________
(b) nickel(III) fluoride _________________
(c) ammonium sulphate _________________
19. Write the name:
(a) Sr3P2 __________________________________
(b) V2O5 __________________________________
(c) Cs2Cr2O7 __________________________________
20. What is the difference between a chemical change and a physical change?
_____________________________________________________________________________
_____________________________________________________________________________
UNIT 2 TEST
1. Which of the following hazard label symbols warns that the chemical is dangerously
reactive?
I.
II.
III.
IV.
A. I
B. I, III
C. II, III
D. II, III, IV
2. Which term(s) describe the formation of a solid from either a liquid or a gas?
I. freezing
II. deposition
III. condensation
IV. solidification
A. I only
B. II and III only
C. I, II, and IV only
D. I, II, III, and IV
3. Which phrase best describes the physical property known as density?
A. the tendency to be solid, liquid, or gas
B. the ability to dissolve in water
C. the ability of a material to flow
D. the ratio of a material’s mass to its volume
4. Which of the following best describes atoms?
A. nucleus contains protons and electrons; nucleus is surrounded by neutrons
B. nucleus contains neutrons; nucleus is surrounded by protons and electrons
C. nucleus contains protons and neutrons; nucleus is surrounded by electrons
D. nucleus contains electrons and electrons; nucleus is surrounded by protons
5. Which of the following is a metal?
A. fluorine
B. potassium
C. phosphorus
D. selenium
6. What is meant by the term “group” in the periodic table?
A. a collection of elements that are all solids
B. a horizontal row of elements
C. a collection of elements in the same period
D. a family of elements with similar properties
7. Which phrase correctly describes for both the sulphide ion S2Å| and the oxide ion O2Å|?
A. more protons than electrons
B. more electrons than protons
C. equal numbers of protons and electrons
D. equal number of neutrons and protons
8. Which of the following is a covalent compound?
A. Fe
B. FeF3
C. OF2
D. O3
9. How many atoms in total are represented by the formula Fe(CH3COO)3?
A. 6
B. 9
C. 11
D. 22
10. One bad apple in a barrel causes the whole bunch to turn rotten, causing them to turn
brown, get warmer, and become mushy. Which kinds of change(s) are involved?
A. physical change only that is exothermic
B. chemical change only that is endothermic
C. chemical change and physical change that is exothermic
D. chemical change and physical change that is endothermic
Match the Descriptor on the left with the best Term on the right.
Each Term may be used only once.
Descriptor Term
_____ 11. an example of a physical property
_____ 12. the smallest particle of a piece of iron
_____ 13. Water is an example.
_____ 14. cannot be decomposed by chemical means
_____ 15. Elements in this family have 7 valence electrons.
_____ 16. a model that shows how electrons are arranged
_____ 17. This subatomic particle has no electric charge.
_____ 18. This number identifies the element.
_____ 19. involves shared pairs of electrons
_____ 20. contains a metal and a non-metal chemically combined
A. alkaline earth metal
B. atom
C. atomic mass
D. atomic number
E. Bohr model
F. boiling point
G. covalent compound
H. element
I. halogen
J. ionic compound
K. molecule
L. neutron
M. proton
N. Rutherford model
Short Answer Questions
21. Using kinetic molecular theory, explain how a solid can turn into a liquid.
____________________________________________________________________________________________
____________________________________________________________________________________________
22. Draw a simple sketch of an atom containing 5 protons, 6 neutrons, and as many electrons as
are needed to make the atom neutral. Show the correct number of electrons in each energy
level.
23. Sketch a Bohr model diagram indicating the number of protons as well as the number and
arrangement of electrons in each:
(a) Ca
(b) Al3+
(c) Cl
24. Use a periodic table to identify these elements.
(a) the metal in period 5, group 11 _________
(b) the element with atomic mass 16.0 amu _________
(c) the metalloid in the second period _________
(d) the metal in period 4 with three common ion charges _________
(e) the halogen whose atoms are heavier than sulphur’s atoms and which has an atomic
number less than selenium _________
25. List six chemical or physical properties typical of alkali metal elements.
_____________________________________________________________________________
_____________________________________________________________________________
_____________________________________________________________________________
26. Write names for the following compounds.
(a) NaCl _________
(b) Mg3P2 _________
(c) FeO _________
(d) (NH4)3PO4 _________
(e) Pt(SO4)2 _________
27. Write formulas for the following compounds.
(a) calcium bromide _________
(b) copper(I) phosphide _________
(c) potassium carbonate _________
(d) aluminum hydroxide _________
(e) ruthenium(IV) sulphite _________
28. (a) Explain the difference between a physical change and a chemical change.
__________________________________________________________________________
__________________________________________________________________________
(b) Give an example of each type of change.
__________________________________________________________________________
__________________________________________________________________________
1. Which of the following hazard label symbols warns that the chemical is dangerously
reactive?
I.
II.
III.
IV.
A. I
B. I, III
C. II, III
D. II, III, IV
2. Which term(s) describe the formation of a solid from either a liquid or a gas?
I. freezing
II. deposition
III. condensation
IV. solidification
A. I only
B. II and III only
C. I, II, and IV only
D. I, II, III, and IV
3. Which phrase best describes the physical property known as density?
A. the tendency to be solid, liquid, or gas
B. the ability to dissolve in water
C. the ability of a material to flow
D. the ratio of a material’s mass to its volume
4. Which of the following best describes atoms?
A. nucleus contains protons and electrons; nucleus is surrounded by neutrons
B. nucleus contains neutrons; nucleus is surrounded by protons and electrons
C. nucleus contains protons and neutrons; nucleus is surrounded by electrons
D. nucleus contains electrons and electrons; nucleus is surrounded by protons
5. Which of the following is a metal?
A. fluorine
B. potassium
C. phosphorus
D. selenium
6. What is meant by the term “group” in the periodic table?
A. a collection of elements that are all solids
B. a horizontal row of elements
C. a collection of elements in the same period
D. a family of elements with similar properties
7. Which phrase correctly describes for both the sulphide ion S2Å| and the oxide ion O2Å|?
A. more protons than electrons
B. more electrons than protons
C. equal numbers of protons and electrons
D. equal number of neutrons and protons
8. Which of the following is a covalent compound?
A. Fe
B. FeF3
C. OF2
D. O3
9. How many atoms in total are represented by the formula Fe(CH3COO)3?
A. 6
B. 9
C. 11
D. 22
10. One bad apple in a barrel causes the whole bunch to turn rotten, causing them to turn
brown, get warmer, and become mushy. Which kinds of change(s) are involved?
A. physical change only that is exothermic
B. chemical change only that is endothermic
C. chemical change and physical change that is exothermic
D. chemical change and physical change that is endothermic
Match the Descriptor on the left with the best Term on the right.
Each Term may be used only once.
Descriptor Term
_____ 11. an example of a physical property
_____ 12. the smallest particle of a piece of iron
_____ 13. Water is an example.
_____ 14. cannot be decomposed by chemical means
_____ 15. Elements in this family have 7 valence electrons.
_____ 16. a model that shows how electrons are arranged
_____ 17. This subatomic particle has no electric charge.
_____ 18. This number identifies the element.
_____ 19. involves shared pairs of electrons
_____ 20. contains a metal and a non-metal chemically combined
A. alkaline earth metal
B. atom
C. atomic mass
D. atomic number
E. Bohr model
F. boiling point
G. covalent compound
H. element
I. halogen
J. ionic compound
K. molecule
L. neutron
M. proton
N. Rutherford model
Short Answer Questions
21. Using kinetic molecular theory, explain how a solid can turn into a liquid.
____________________________________________________________________________________________
____________________________________________________________________________________________
22. Draw a simple sketch of an atom containing 5 protons, 6 neutrons, and as many electrons as
are needed to make the atom neutral. Show the correct number of electrons in each energy
level.
23. Sketch a Bohr model diagram indicating the number of protons as well as the number and
arrangement of electrons in each:
(a) Ca
(b) Al3+
(c) Cl
24. Use a periodic table to identify these elements.
(a) the metal in period 5, group 11 _________
(b) the element with atomic mass 16.0 amu _________
(c) the metalloid in the second period _________
(d) the metal in period 4 with three common ion charges _________
(e) the halogen whose atoms are heavier than sulphur’s atoms and which has an atomic
number less than selenium _________
25. List six chemical or physical properties typical of alkali metal elements.
_____________________________________________________________________________
_____________________________________________________________________________
_____________________________________________________________________________
26. Write names for the following compounds.
(a) NaCl _________
(b) Mg3P2 _________
(c) FeO _________
(d) (NH4)3PO4 _________
(e) Pt(SO4)2 _________
27. Write formulas for the following compounds.
(a) calcium bromide _________
(b) copper(I) phosphide _________
(c) potassium carbonate _________
(d) aluminum hydroxide _________
(e) ruthenium(IV) sulphite _________
28. (a) Explain the difference between a physical change and a chemical change.
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(b) Give an example of each type of change.
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