Question 1

Is the following transformation representative of a physical change or a chemical change?

Accepted Answer

A)  chemical change because of the formation of elements 
B)  physical change because a new material has been formed 
C)  chemical change because the atoms are connected differently 
D)  physical change because of a change in phase 
A)  chemical change because of the formation of elements 
B)  physical change because a new material has been formed 
C)  chemical change because the atoms are connected differently 
D)  physical change because of a change in phase

Question 2

Is aging primarily an example of a physical or chemical change?

Accepted Answer

A)  Aging is an example of a physical change since it involves our physical bodies getting older each day. 
B)  Aging is an example of a chemical change involving the chemical reformation of our biomolecules. 
C)  Aging cannot be classified as either a physical or chemical change. 
D)  None of the above is true. 
A)  Aging is an example of a physical change since it involves our physical bodies getting older each day. 
B)  Aging is an example of a chemical change involving the chemical reformation of our biomolecules. 
C)  Aging cannot be classified as either a physical or chemical change. 
D)  None of the above is true.

Question 3

What is the name of the following compound? CO2

Accepted Answer

A)  carbon dioxide 
B)  dicobalt 
C)  dioxocarbon 
D)  calcium oxide 
E)  calcium dioxide 
A)  carbon dioxide 
B)  dicobalt 
C)  dioxocarbon 
D)  calcium oxide 
E)  calcium dioxide

Question 4

Oxygen atoms are used to make water molecules. Does this mean that oxygen,   , and water,   O, have similar properties?

Accepted Answer

A)  Yes, and this explains how fish are able to breathe water. 
B)  Yes, but that their properties are similar is only a coincidence. 
C)  No, but their similar properties are only a coincidence. 
D)  No, compounds are uniquely different from the elements from which they're made. 
A)  Yes, and this explains how fish are able to breathe water. 
B)  Yes, but that their properties are similar is only a coincidence. 
C)  No, but their similar properties are only a coincidence. 
D)  No, compounds are uniquely different from the elements from which they're made.

Question 5

The atomic symbol for cobalt is ________.

Accepted Answer

A)  Co 
B)  CO 
C)  Ct 
D)  27 
A)  Co 
B)  CO 
C)  Ct 
D)  27

Question 6

Which of the following boxes represents a suspension?       A B C

Accepted Answer

A)  Only A represents a suspension. 
B)  Only B represents a suspension. 
C)  Only C represents a suspension. 
D)  All of the boxes represent a suspension. 
A)  Only A represents a suspension. 
B)  Only B represents a suspension. 
C)  Only C represents a suspension. 
D)  All of the boxes represent a suspension.

Question 7

Should the periodic table be memorized? Why or why not?

Accepted Answer

A)  Yes. Like the alphabet, we need to memorize the periodic table in order to easily write the language of chemistry. 
B)  Yes. Without memorizing the periodic table, one would not have any real understanding of how and why chemical compounds are put together. 
C)  No. The periodic table changes every year. Memorizing it would be a waste of time. 
D)  No. The periodic table is a reference to be used, not memorized. 
A)  Yes. Like the alphabet, we need to memorize the periodic table in order to easily write the language of chemistry. 
B)  Yes. Without memorizing the periodic table, one would not have any real understanding of how and why chemical compounds are put together. 
C)  No. The periodic table changes every year. Memorizing it would be a waste of time. 
D)  No. The periodic table is a reference to be used, not memorized.

Question 8

If you filter sea water to remove all of the particles you would be left with a clear ________.

Accepted Answer

A)  homogeneous mixture called a solution 
B)  homogeneous mixture called a suspension 
C)  heterogeneous mixture called a solution 
D)  heterogeneous mixture called a suspension 
E)  pure liquid 
A)  homogeneous mixture called a solution 
B)  homogeneous mixture called a suspension 
C)  heterogeneous mixture called a solution 
D)  heterogeneous mixture called a suspension 
E)  pure liquid

Question 9

Half-frozen fruit punch is always sweeter than the same fruit punch completely melted because ________.

Accepted Answer

A)  the sugar sinks to the bottom 
B)  crystallization is a purifying process 
C)  the half-frozen fruit punch is warmer 
D)  sugar molecules are less soluble in a half-frozen solution 
A)  the sugar sinks to the bottom 
B)  crystallization is a purifying process 
C)  the half-frozen fruit punch is warmer 
D)  sugar molecules are less soluble in a half-frozen solution

Question 10

Which of the following elements is a halogen?

Accepted Answer

A)  argon (Ar) 
B)  lead (Pb) 
C)  chlorine (Cl) 
D)  indium (In) 
E)  lithium (Li) 
A)  argon (Ar) 
B)  lead (Pb) 
C)  chlorine (Cl) 
D)  indium (In) 
E)  lithium (Li)

Question 11

Which of the following is a metalloid?

Accepted Answer

A)  antimony (atomic no. = 51) 
B)  zinc (atomic no. = 30) 
C)  iodine (atomic no. = 53) 
D)  uranium (atomic no. = 92) 
E)  sulfur (atomic no. = 16) 
A)  antimony (atomic no. = 51) 
B)  zinc (atomic no. = 30) 
C)  iodine (atomic no. = 53) 
D)  uranium (atomic no. = 92) 
E)  sulfur (atomic no. = 16)

Question 12

Classify the following as element, compound, or mixture, and justify your classifications: sodium chloride, stainless steel, sugar, aluminum, ice.

Accepted Answer

A)  mixture; element; compound; element; element 
B)  compound; mixture; compound element; compound 
C)  mixture; compound; mixture; element; compound 
D)  compound; element; compound; element; compound 
A)  mixture; element; compound; element; element 
B)  compound; mixture; compound element; compound 
C)  mixture; compound; mixture; element; compound 
D)  compound; element; compound; element; compound

Question 13

Which element would have chemical properties the most similar to chlorine (Cl)?

Accepted Answer

A)  Br 
B)  O 
C)  Ar 
D)  S 
E)  Na 
A)  Br 
B)  O 
C)  Ar 
D)  S 
E)  Na

Question 14

When blue food coloring is dissolved in water, the result is a ________.

Accepted Answer

A)  homogeneous mixture called a solution 
B)  homogeneous mixture called a suspension 
C)  heterogeneous mixture called a solution 
D)  heterogeneous mixture called a suspension 
E)  pure liquid 
A)  homogeneous mixture called a solution 
B)  homogeneous mixture called a suspension 
C)  heterogeneous mixture called a solution 
D)  heterogeneous mixture called a suspension 
E)  pure liquid

Question 15

How many atoms of Oxygen (O) are in HClO4?

Accepted Answer

A)  5 
B)  2 
C)  3 
D)  4 
E)  1 
A)  5 
B)  2 
C)  3 
D)  4 
E)  1

Question 16

What is the difference between a compound and a mixture?

Accepted Answer

A)  A mixture can be physically separated into its components; a compound cannot be physically separated into its components. 
B)  A compound can be physically separated into its components; a mixture cannot be physically separated into its components. 
C)  A compound is just a mixture of elements. 
D)  The components of a mixture do not have the same properties individually as they do when mixed. 
E)  The components of a compound have the same properties individually as they do when mixed. 
A)  A mixture can be physically separated into its components; a compound cannot be physically separated into its components. 
B)  A compound can be physically separated into its components; a mixture cannot be physically separated into its components. 
C)  A compound is just a mixture of elements. 
D)  The components of a mixture do not have the same properties individually as they do when mixed. 
E)  The components of a compound have the same properties individually as they do when mixed.

Question 17

Which of the following boxes represents a compound?       A B C

Accepted Answer

A)  only A 
B)  only B 
C)  only C 
D)  both A and C 
A)  only A 
B)  only B 
C)  only C 
D)  both A and C

Question 18

The probe tip of a scanning probe microscope ________.

Accepted Answer

A)  floats above the atoms of a sample 
B)  etches into the atoms of a sample 
C)  chemically changes the atoms of a sample 
D)  injects a magnetic field into the atoms of a sample 
A)  floats above the atoms of a sample 
B)  etches into the atoms of a sample 
C)  chemically changes the atoms of a sample 
D)  injects a magnetic field into the atoms of a sample

Question 19

The repeating trends that take place when examining the elements are called ________.

Accepted Answer

A)  periodicity 
B)  the family cycle 
C)  the metal shift 
D)  a group conscience 
E)  none of the above 
A)  periodicity 
B)  the family cycle 
C)  the metal shift 
D)  a group conscience 
E)  none of the above

Question 20

Which of the following elements is in the fourth period?

Accepted Answer

A)  chromium (Cr) 
B)  hydrogen (H) 
C)  beryllium(Be) 
D)  carbon (
C)  
E)  zirconium (Zr) 
A)  chromium (Cr) 
B)  hydrogen (H) 
C)  beryllium(Be) 
D)  carbon (
C)  
E)  zirconium (Zr)

Is the following transformation representative of a physical change or a chemical change?

Is aging primarily an example of a physical or chemical change?

What is the name of the following compound? CO₂

Oxygen atoms are used to make water molecules. Does this mean that oxygen, , and water, O, have similar properties?

The atomic symbol for cobalt is ________.

Which of the following boxes represents a suspension? A B C

Should the periodic table be memorized? Why or why not?

If you filter sea water to remove all of the particles you would be left with a clear ________.

Half-frozen fruit punch is always sweeter than the same fruit punch completely melted because ________.

Which of the following elements is a halogen?

Which of the following is a metalloid?

Classify the following as element, compound, or mixture, and justify your classifications: sodium chloride, stainless steel, sugar, aluminum, ice.

Which element would have chemical properties the most similar to chlorine (Cl)?

When blue food coloring is dissolved in water, the result is a ________.

How many atoms of Oxygen (O) are in HClO₄?

What is the difference between a compound and a mixture?

Which of the following boxes represents a compound? A B C

The probe tip of a scanning probe microscope ________.

The repeating trends that take place when examining the elements are called ________.

Which of the following elements is in the fourth period?

About Science

Particles of Matter

Subatomic Particles

The Atomic Nucleus

How Atoms Bond

How Molecules Mix

How Water Behaves

How Chemicals React

Acids and Bases in Our Environment

Oxidations and Reductions Charge the World

Organic Compounds

Nutrients of Life

Medicinal Chemistry

Optimizing Food Production

Protection Water and Air Resources

Capturing Energy

Filters

Exam 3: Elements of Chemistry

Is the following transformation representative of a physical change or a chemical change?

Is aging primarily an example of a physical or chemical change?

What is the name of the following compound? CO2

Oxygen atoms are used to make water molecules. Does this mean that oxygen, , and water, O, have similar properties?

The atomic symbol for cobalt is ________.

Which of the following boxes represents a suspension? A B C

Should the periodic table be memorized? Why or why not?

If you filter sea water to remove all of the particles you would be left with a clear ________.

Half-frozen fruit punch is always sweeter than the same fruit punch completely melted because ________.

Which of the following elements is a halogen?

Which of the following is a metalloid?

Classify the following as element, compound, or mixture, and justify your classifications: sodium chloride, stainless steel, sugar, aluminum, ice.

Which element would have chemical properties the most similar to chlorine (Cl)?

When blue food coloring is dissolved in water, the result is a ________.

How many atoms of Oxygen (O) are in HClO4?

What is the difference between a compound and a mixture?

Which of the following boxes represents a compound? A B C

The probe tip of a scanning probe microscope ________.

The repeating trends that take place when examining the elements are called ________.

Which of the following elements is in the fourth period?

About Science

Particles of Matter

Subatomic Particles

The Atomic Nucleus

How Atoms Bond

How Molecules Mix

How Water Behaves

How Chemicals React

Acids and Bases in Our Environment

Oxidations and Reductions Charge the World

Organic Compounds

Nutrients of Life

Medicinal Chemistry

Optimizing Food Production

Protection Water and Air Resources

Capturing Energy

Filters

What is the name of the following compound? CO₂

How many atoms of Oxygen (O) are in HClO₄?