Question 1

How would you classify the following material? milk

Accepted Answer

A)  a suspension 
B)  a heterogeneous mixture 
C)  a solution 
D)  an element 
E)  a compound 
A)  a suspension 
B)  a heterogeneous mixture 
C)  a solution 
D)  an element 
E)  a compound

Question 2

The four substances below are either elements or compounds. Which are which?

Accepted Answer

A)  elements:   ; compounds:   
B)  elements:     ; compounds:   
C)  elements:   ; compounds:   
D)  elements:   ; compounds:   
A)  elements:   ; compounds:   
B)  elements:     ; compounds:   
C)  elements:   ; compounds:   
D)  elements:   ; compounds:

Question 3

Which of the following is a metal?

Accepted Answer

A)  titanium (atomic no. = 22) 
B)  sulfur (atomic no. = 16) 
C)  selenium (atomic no. = 34) 
D)  xenon (atomic no. = 54) 
E)  helium (atomic no. = 2) 
A)  titanium (atomic no. = 22) 
B)  sulfur (atomic no. = 16) 
C)  selenium (atomic no. = 34) 
D)  xenon (atomic no. = 54) 
E)  helium (atomic no. = 2)

Question 4

About how many elements do you have access to as a consumer of market goods?

Accepted Answer

A)  none 
B)  one 
C)  ten 
D)  one hundred 
A)  none 
B)  one 
C)  ten 
D)  one hundred

Question 5

Which of the following would be considered a chemical property?

Accepted Answer

A)  reactivity towards water 
B)  melting temperature 
C)  boiling temperature 
D)  conductivity 
E)  flexibility 
A)  reactivity towards water 
B)  melting temperature 
C)  boiling temperature 
D)  conductivity 
E)  flexibility

Question 6

Which of the following is not the name of a chemical family?

Accepted Answer

A)  heavy metals 
B)  transition metals 
C)  alkali metals 
D)  alkaline-earth metals 
E)  noble gases 
A)  heavy metals 
B)  transition metals 
C)  alkali metals 
D)  alkaline-earth metals 
E)  noble gases

Question 7

How many atoms are in one molecule of Na2SO4?

Accepted Answer

A)  7 
B)  2 
C)  4 
D)  3 
E)  24 
A)  7 
B)  2 
C)  4 
D)  3 
E)  24

Question 8

Nanotechnology and microtechnology are similar in that they both ________.

Accepted Answer

A)  are interdisciplinary 
B)  have huge impacts on society 
C)  are relatively new technologies 
D)  all of the above 
A)  are interdisciplinary 
B)  have huge impacts on society 
C)  are relatively new technologies 
D)  all of the above

Question 9

Which of the following is not a chemical change?

Accepted Answer

A)  a rock being crushed to powder 
B)  grass growing 
C)  grape juice turning into wine 
D)  a loaf of bread growing mold 
E)  wood burning to ash 
A)  a rock being crushed to powder 
B)  grass growing 
C)  grape juice turning into wine 
D)  a loaf of bread growing mold 
E)  wood burning to ash

Question 10

Someone argues that he or she doesn't drink tap water because it contains thousands of molecules of some impurity in each glass. How would you respond in defense of the water's purity, if it indeed does contain thousands of molecules of some impurity per glass?

Accepted Answer

A)  Impurities aren't necessarily bad, in fact, they may be good for you. 
B)  The water contains water molecules and each water molecule is pure. 
C)  There's no defense. If the water contains impurities it should not be drunk. 
D)  Compared to the billions and billions of water molecules, a thousand molecules of something else is practically nothing. 
A)  Impurities aren't necessarily bad, in fact, they may be good for you. 
B)  The water contains water molecules and each water molecule is pure. 
C)  There's no defense. If the water contains impurities it should not be drunk. 
D)  Compared to the billions and billions of water molecules, a thousand molecules of something else is practically nothing.

Question 11

Which of the following would not be considered a physical property?

Accepted Answer

A)  temperature at which a material catches on fire 
B)  color 
C)  conductivity 
D)  hardness 
E)  temperature at which a material melts 
A)  temperature at which a material catches on fire 
B)  color 
C)  conductivity 
D)  hardness 
E)  temperature at which a material melts

Question 12

How many different elements are in the compound C6H12O6?

Accepted Answer

A)  3 
B)  6 
C)  24 
D)  All of the elements are the same. 
A)  3 
B)  6 
C)  24 
D)  All of the elements are the same.

Question 13

Which of the following would be considered a heterogeneous mixture?

Accepted Answer

A)  salad dressing 
B)  water 
C)  milk 
D)  vegetable oil 
E)  vinegar 
A)  salad dressing 
B)  water 
C)  milk 
D)  vegetable oil 
E)  vinegar

Question 14

Which of the following describes a nonmetal?

Accepted Answer

A)  poor conductor of electricity 
B)  shiny 
C)  malleable 
D)  ductile 
E)  good conductor of heat 
A)  poor conductor of electricity 
B)  shiny 
C)  malleable 
D)  ductile 
E)  good conductor of heat

Question 15

Is the air in your house a homogeneous or heterogeneous mixture?

Accepted Answer

A)  homogeneous because it is mixed very well 
B)  heterogeneous because of the dust particles it contains 
C)  homogeneous because it is all at the same temperature 
D)  heterogeneous because it consists of different types of molecules 
A)  homogeneous because it is mixed very well 
B)  heterogeneous because of the dust particles it contains 
C)  homogeneous because it is all at the same temperature 
D)  heterogeneous because it consists of different types of molecules

Question 16

A sample of iron weighs more after it rusts because ________.

Accepted Answer

A)  it has expanded into a greater volume 
B)  rust contains twice as many iron atoms 
C)  of the additional oxygen it contains 
D)  Wrong. Iron actually weighs less after it rusts 
A)  it has expanded into a greater volume 
B)  rust contains twice as many iron atoms 
C)  of the additional oxygen it contains 
D)  Wrong. Iron actually weighs less after it rusts

Question 17

Which of the following would be considered a homogeneous mixture?

Accepted Answer

A)  wine 
B)  hydrogen cyanide 
C)  rusty iron 
D)  pretzel 
E)  sugar 
A)  wine 
B)  hydrogen cyanide 
C)  rusty iron 
D)  pretzel 
E)  sugar

Question 18

What is the difference between a compound and a mixture?

Accepted Answer

A)  They both consist of atoms from different elements. 
B)  The way in which their atoms are bonded together. 
C)  One is a solid and the other is a liquid. 
D)  The components of a mixture are not chemically bonded together. 
A)  They both consist of atoms from different elements. 
B)  The way in which their atoms are bonded together. 
C)  One is a solid and the other is a liquid. 
D)  The components of a mixture are not chemically bonded together.

Question 19

Microtechnology began ________.

Accepted Answer

A)  about 60 years ago with the invention of solid state transistors 
B)  in the 1990s with the use of computers 
C)  with the development of micron chemistry in the early 1800s 
D)  at the close of World War II 
A)  about 60 years ago with the invention of solid state transistors 
B)  in the 1990s with the use of computers 
C)  with the development of micron chemistry in the early 1800s 
D)  at the close of World War II

Question 20

Nanotechnology looks at working with particles ________.

Accepted Answer

A)  100 microns or larger 
B)  1 to 100 nanometers, the realm of individual atoms and molecules 
C)  50 grams and smaller 
D)  infinitesimally small, the size of electrons 
A)  100 microns or larger 
B)  1 to 100 nanometers, the realm of individual atoms and molecules 
C)  50 grams and smaller 
D)  infinitesimally small, the size of electrons

How would you classify the following material? milk

The four substances below are either elements or compounds. Which are which?

Which of the following is a metal?

About how many elements do you have access to as a consumer of market goods?

Which of the following would be considered a chemical property?

Which of the following is not the name of a chemical family?

How many atoms are in one molecule of Na₂SO₄?

Nanotechnology and microtechnology are similar in that they both ________.

Which of the following is not a chemical change?

Someone argues that he or she doesn't drink tap water because it contains thousands of molecules of some impurity in each glass. How would you respond in defense of the water's purity, if it indeed does contain thousands of molecules of some impurity per glass?

Which of the following would not be considered a physical property?

How many different elements are in the compound C₆H₁₂O₆?

Which of the following would be considered a heterogeneous mixture?

Which of the following describes a nonmetal?

Is the air in your house a homogeneous or heterogeneous mixture?

A sample of iron weighs more after it rusts because ________.

Which of the following would be considered a homogeneous mixture?

What is the difference between a compound and a mixture?

Microtechnology began ________.

Nanotechnology looks at working with particles ________.

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

How would you classify the following material? milk

The four substances below are either elements or compounds. Which are which?

Which of the following is a metal?

About how many elements do you have access to as a consumer of market goods?

Which of the following would be considered a chemical property?

Which of the following is not the name of a chemical family?

How many atoms are in one molecule of Na2SO4?

Nanotechnology and microtechnology are similar in that they both ________.

Which of the following is not a chemical change?

Someone argues that he or she doesn't drink tap water because it contains thousands of molecules of some impurity in each glass. How would you respond in defense of the water's purity, if it indeed does contain thousands of molecules of some impurity per glass?

Which of the following would not be considered a physical property?

How many different elements are in the compound C6H12O6?

Which of the following would be considered a heterogeneous mixture?

Which of the following describes a nonmetal?

Is the air in your house a homogeneous or heterogeneous mixture?

A sample of iron weighs more after it rusts because ________.

Which of the following would be considered a homogeneous mixture?

What is the difference between a compound and a mixture?

Microtechnology began ________.

Nanotechnology looks at working with particles ________.

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

How many atoms are in one molecule of Na₂SO₄?

How many different elements are in the compound C₆H₁₂O₆?