Question 1

The scanning probe microscope ________.

Accepted Answer

A) uses very large mirrors and lenses to enhance an image 
B) can scan small things from a large distance away, such as the surface of the Moon 
C) characterizes the surface atoms of a material 
D) vaporizes a substance, then analyzes and manipulates the components 
A) uses very large mirrors and lenses to enhance an image 
B) can scan small things from a large distance away, such as the surface of the Moon 
C) characterizes the surface atoms of a material 
D) vaporizes a substance, then analyzes and manipulates the components

Question 2

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 3

The element silicon has a melting point of 1,410°C and a boiling point of 2,355°C. It is a weak conductor of electricity, its density is 2.3 grams per cubic centimeter and it easily forms silicon dioxide when exposed to air. Which of the following is a chemical property of silicon?

Accepted Answer

A) its ability to conduct electricity 
B) its density 
C) its melting point 
D) its ability to react with oxygen to form silicon dioxide 
E) C and D 
A) its ability to conduct electricity 
B) its density 
C) its melting point 
D) its ability to react with oxygen to form silicon dioxide 
E) C and D

Question 4

A chemical change involves a change in ________.

Accepted Answer

A) how atoms are bonded 
B) the elements of a molecule 
C) phase 
D) all of the above 
A) how atoms are bonded 
B) the elements of a molecule 
C) phase 
D) all of the above

Question 5

Which of the following elements will most likely be shiny and flexible?

Accepted Answer

A) rhodium (Rh) 
B) hydrogen (H) 
C) selenium (Se) 
D) iodine (I) 
E) silicon (Si) 
A) rhodium (Rh) 
B) hydrogen (H) 
C) selenium (Se) 
D) iodine (I) 
E) silicon (Si)

Question 6

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 7

Which atom is largest?

Accepted Answer

A) Rb 
B) K 
C) Na 
D) Li 
E) H 
A) Rb 
B) K 
C) Na 
D) Li 
E) H

Question 8

Which of these is not a metal?

Accepted Answer

A) selenium (atomic no. = 34) 
B) gallium (atomic no. = 31) 
C) lithium (atomic no. = 3) 
D) potassium (atomic no. = 19) 
E) vanadium (atomic no. = 23) 
A) selenium (atomic no. = 34) 
B) gallium (atomic no. = 31) 
C) lithium (atomic no. = 3) 
D) potassium (atomic no. = 19) 
E) vanadium (atomic no. = 23)

Question 9

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

Question 10

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 11

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 12

Read carefully. Twice as much as one million trillion is two million trillion. One thousand times as much is 1000 million trillion. One million times as much is 1,000,000 million trillion, which is the same as one trillion trillion. Thus, one trillion trillion is a million times greater than a million trillion. Got that? So how many more water molecules than impurity molecules are there in a glass of water that is 99.9999 percent pure?

Accepted Answer

A) 1000 (one thousand: 1 ×   )more water molecules than impurities molecules 
B) 1,000,000 (one million: 1 ×   )more water molecules than impurities molecules 
C) 1,000,000,000 (one billion: 1 ×   )more water molecules than impurities molecules 
D) 1,000,000,000,000,000,000 (one million trillion: 1 ×   )more water molecules than impurities molecules 
A) 1000 (one thousand: 1 ×   )more water molecules than impurities molecules 
B) 1,000,000 (one million: 1 ×   )more water molecules than impurities molecules 
C) 1,000,000,000 (one billion: 1 ×   )more water molecules than impurities molecules 
D) 1,000,000,000,000,000,000 (one million trillion: 1 ×   )more water molecules than impurities molecules

Question 13

Which of the following would be considered a physical property?

Accepted Answer

A) density 
B) flammability 
C) corrosion resistance 
D) reactivity towards acid 
E) oxygen sensitivity 
A) density 
B) flammability 
C) corrosion resistance 
D) reactivity towards acid 
E) oxygen sensitivity

Question 14

The boiling point of methanol is 65°C and the boiling point of ethanol is 78°C. Which of the following statements is true?

Accepted Answer

A) At 70°C you would have methanol gas and liquid ethanol. 
B) At 90°C you would have methanol and ethanol as solids. 
C) At 50°C you would have methanol and ethanol as gases. 
D) At 40°C the methanol reacts with the ethanol. 
E) none of the above 
A) At 70°C you would have methanol gas and liquid ethanol. 
B) At 90°C you would have methanol and ethanol as solids. 
C) At 50°C you would have methanol and ethanol as gases. 
D) At 40°C the methanol reacts with the ethanol. 
E) none of the above

Question 15

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 16

Why can't the elements of a compound be separated from one another by physical means?

Accepted Answer

A) They are too homogeneous when found within a compound. 
B) Their atoms are too tightly bound to one another. 
C) Elements found within a compound tend to be inert. 
D) Elements tend not to be soluble in water. 
A) They are too homogeneous when found within a compound. 
B) Their atoms are too tightly bound to one another. 
C) Elements found within a compound tend to be inert. 
D) Elements tend not to be soluble in water.

Question 17

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 18

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 19

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 20

What can be said about drinking water that is 99.9999 percent free of some poison, such as a pesticide?

Accepted Answer

A) In each 10,000 parts of the contaminated water there is one part pesticide and 9999 parts pure water. 
B) In each 100,000 parts of the contaminated water there is one part pesticide and 99,999 parts pure water. 
C) The ratio of water molecules to pesticide molecules in the glass is so great that drinking the water is not problematic. 
D) The water is highly contaminated and surely not fit to drink. 
A) In each 10,000 parts of the contaminated water there is one part pesticide and 9999 parts pure water. 
B) In each 100,000 parts of the contaminated water there is one part pesticide and 99,999 parts pure water. 
C) The ratio of water molecules to pesticide molecules in the glass is so great that drinking the water is not problematic. 
D) The water is highly contaminated and surely not fit to drink.

The scanning probe microscope ________.

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

The element silicon has a melting point of 1,410°C and a boiling point of 2,355°C. It is a weak conductor of electricity, its density is 2.3 grams per cubic centimeter and it easily forms silicon dioxide when exposed to air. Which of the following is a chemical property of silicon?

A chemical change involves a change in ________.

Which of the following elements will most likely be shiny and flexible?

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

Which atom is largest?

Which of these is not a metal?

Nanotechnology looks at working with particles ________.

Nanotechnology and microtechnology are similar in that they both ________.

Which of the following would be considered a chemical property?

Which of the following would be considered a physical property?

The boiling point of methanol is 65°C and the boiling point of ethanol is 78°C. Which of the following statements is true?

Microtechnology began ________.

Why can't the elements of a compound be separated from one another by physical means?

What is the name of the following compound? CO₂

Which of the following describes a nonmetal?

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

What can be said about drinking water that is 99.9999 percent free of some poison, such as a pesticide?

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

The scanning probe microscope ________.

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

The element silicon has a melting point of 1,410°C and a boiling point of 2,355°C. It is a weak conductor of electricity, its density is 2.3 grams per cubic centimeter and it easily forms silicon dioxide when exposed to air. Which of the following is a chemical property of silicon?

A chemical change involves a change in ________.

Which of the following elements will most likely be shiny and flexible?

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

Which atom is largest?

Which of these is not a metal?

Nanotechnology looks at working with particles ________.

Nanotechnology and microtechnology are similar in that they both ________.

Which of the following would be considered a chemical property?

Which of the following would be considered a physical property?

The boiling point of methanol is 65°C and the boiling point of ethanol is 78°C. Which of the following statements is true?

Microtechnology began ________.

Why can't the elements of a compound be separated from one another by physical means?

What is the name of the following compound? CO2

Which of the following describes a nonmetal?

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

What can be said about drinking water that is 99.9999 percent free of some poison, such as a pesticide?

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 of Oxygen (O)are in HClO₄?

What is the name of the following compound? CO₂