CHEM 1020 FINAL EXAM | QUESTIONS WITH
VERIFIED ACCURATE ANSWERS | 2026
On a Periodic Table, the columns of elements with similar properties are
groups.
periods.
metals.
Rows. - Answers - groups
The numbers 1 through 4 are used to identify four different elements on the periodic
table. Which element is expected to have 2+ charge when it forms an ion?
3
4
1
2 - Answers - 1
A recent set of advertisements has a picture of an aluminum can with an aluminum-
frame bicycle, along with a hypothetical quote from the can that reads: "I want to be a
bike. Recycle me." The analysis of the life cycle of an item starting with its raw materials
and ending with the used item becoming the raw material for new products is called
cradle-to-grave.
cost-benefit analysis.
cradle-to-cradle.
reusability. - Answers - cradle-to-cradle.
Which of the following is a pure substance?
Concrete
Gasoline
Silver wire
Lemonade - Answers - Silver wire
The quantity 0.0000064 g expressed in scientific notation.
6.4 × 10¯6 g
6.4 × 107 g
6.4 × 106 g
6.4 × 10¯7 g - Answers - 6.4 × 10¯6 g
,Which one of the following is an example of a homogeneous mixture?
A carbonated beverage
A glass of pulp-free lemonade
A bowl of cereal in milk
A chocolate chip cookie - Answers - A glass of pulp-free lemonade
Which corresponds to the composition of the ion typically formed by magnesium?
D
B
A
C - Answers - D
The nucleus of an atom contains
protons only.
electrons, protons, and neutrons.
electrons and protons only.
protons and neutrons only. - Answers - protons and neutrons only.
Which one of the following is a subatomic particle located in the center of the atom and
has a positive charge?
Photons
Neutrons
Electrons
Protons - Answers - Protons
Which corresponds to the composition of the ion typically formed by fluorine?
A
D
B
C - Answers - B
(Note: Remember that fluorine is a halogen that needs one electron to make an octet.)
Air is a(n)
compound.
mixture.
pure substance.
element. - Answers - mixture.
Currently, the primary source of sulfur dioxide emissions into the atmosphere is
,coal burning power plants.
plastic manufacturing.
diesel trucks.
gasoline-powered lawnmowers. - Answers - coal burning power plants.
All of these pollutants can be detected by their odors except
NOx.
O3.
CO.
SOx. - Answers - CO.
Based on its name, which carbon compound contains the fewest carbon atoms?
Ethanol
Chlorobutane
Propyl alcohol
Methane - Answers - Methane
An inversion layer happens when a certain weather pattern traps cooler air near the
surface of the earth with a warmer air mass above it. Why is this a problem?
Heatwaves can occur
Excess precipitation could cause flooding
The cold air increases the chance for snowstorms
Air pollution concentrates in the inversion layer - Answers - Air pollution concentrates in
the inversion layer
What two factors are considered when determining the risk assessment for air
pollutants?
Exposure and ppm
Toxicity and percentage
Toxicity and exposure
Percentage and ppm - Answers - Toxicity and exposure
The EPA limit for CO is 9 ppm. Express this number as a percentage.
0.09 percent
9 percent
0.0009 percent
90 percent - Answers - 0.0009 percent
Which chemical components are given off in car exhaust?
All of these choices are correct
, CO2
NOx
H2O - Answers - All of these choices are correct
The more toxic the pollutant, the higher the concentration is set when concerning air
quality standards.
True
False - Answers - False
Which is the balanced chemical equation for the reaction of nitrogen (N2) with oxygen
(O2) to form NO?
NO → N2 + O2
2 NO → N2 + O2
N2 + O2 → 2 NO
N2 + O2 → NO - Answers - N2 + O2 → 2 NO
Ozone is a secondary pollutant. A secondary pollutant is
one that is naturally present in our atmosphere.
one that is less hazardous than a primary pollutant.
not produced directly but as the product of the interaction of two or more pollutants.
not as hazardous as a primary pollutant. - Answers - not produced directly but as the
product of the interaction of two or more pollutants.
What is the primary component of an exhaled breath?
N2
CO2
O2
H2O - Answers - N2
How many carbon atoms does the molecule octane have?
4
2
8
0 - Answers - 8
The ozone hole is most prominent on the Earth over
Africa.
Europe.
Antarctica.
North America. - Answers - Antarctica.
VERIFIED ACCURATE ANSWERS | 2026
On a Periodic Table, the columns of elements with similar properties are
groups.
periods.
metals.
Rows. - Answers - groups
The numbers 1 through 4 are used to identify four different elements on the periodic
table. Which element is expected to have 2+ charge when it forms an ion?
3
4
1
2 - Answers - 1
A recent set of advertisements has a picture of an aluminum can with an aluminum-
frame bicycle, along with a hypothetical quote from the can that reads: "I want to be a
bike. Recycle me." The analysis of the life cycle of an item starting with its raw materials
and ending with the used item becoming the raw material for new products is called
cradle-to-grave.
cost-benefit analysis.
cradle-to-cradle.
reusability. - Answers - cradle-to-cradle.
Which of the following is a pure substance?
Concrete
Gasoline
Silver wire
Lemonade - Answers - Silver wire
The quantity 0.0000064 g expressed in scientific notation.
6.4 × 10¯6 g
6.4 × 107 g
6.4 × 106 g
6.4 × 10¯7 g - Answers - 6.4 × 10¯6 g
,Which one of the following is an example of a homogeneous mixture?
A carbonated beverage
A glass of pulp-free lemonade
A bowl of cereal in milk
A chocolate chip cookie - Answers - A glass of pulp-free lemonade
Which corresponds to the composition of the ion typically formed by magnesium?
D
B
A
C - Answers - D
The nucleus of an atom contains
protons only.
electrons, protons, and neutrons.
electrons and protons only.
protons and neutrons only. - Answers - protons and neutrons only.
Which one of the following is a subatomic particle located in the center of the atom and
has a positive charge?
Photons
Neutrons
Electrons
Protons - Answers - Protons
Which corresponds to the composition of the ion typically formed by fluorine?
A
D
B
C - Answers - B
(Note: Remember that fluorine is a halogen that needs one electron to make an octet.)
Air is a(n)
compound.
mixture.
pure substance.
element. - Answers - mixture.
Currently, the primary source of sulfur dioxide emissions into the atmosphere is
,coal burning power plants.
plastic manufacturing.
diesel trucks.
gasoline-powered lawnmowers. - Answers - coal burning power plants.
All of these pollutants can be detected by their odors except
NOx.
O3.
CO.
SOx. - Answers - CO.
Based on its name, which carbon compound contains the fewest carbon atoms?
Ethanol
Chlorobutane
Propyl alcohol
Methane - Answers - Methane
An inversion layer happens when a certain weather pattern traps cooler air near the
surface of the earth with a warmer air mass above it. Why is this a problem?
Heatwaves can occur
Excess precipitation could cause flooding
The cold air increases the chance for snowstorms
Air pollution concentrates in the inversion layer - Answers - Air pollution concentrates in
the inversion layer
What two factors are considered when determining the risk assessment for air
pollutants?
Exposure and ppm
Toxicity and percentage
Toxicity and exposure
Percentage and ppm - Answers - Toxicity and exposure
The EPA limit for CO is 9 ppm. Express this number as a percentage.
0.09 percent
9 percent
0.0009 percent
90 percent - Answers - 0.0009 percent
Which chemical components are given off in car exhaust?
All of these choices are correct
, CO2
NOx
H2O - Answers - All of these choices are correct
The more toxic the pollutant, the higher the concentration is set when concerning air
quality standards.
True
False - Answers - False
Which is the balanced chemical equation for the reaction of nitrogen (N2) with oxygen
(O2) to form NO?
NO → N2 + O2
2 NO → N2 + O2
N2 + O2 → 2 NO
N2 + O2 → NO - Answers - N2 + O2 → 2 NO
Ozone is a secondary pollutant. A secondary pollutant is
one that is naturally present in our atmosphere.
one that is less hazardous than a primary pollutant.
not produced directly but as the product of the interaction of two or more pollutants.
not as hazardous as a primary pollutant. - Answers - not produced directly but as the
product of the interaction of two or more pollutants.
What is the primary component of an exhaled breath?
N2
CO2
O2
H2O - Answers - N2
How many carbon atoms does the molecule octane have?
4
2
8
0 - Answers - 8
The ozone hole is most prominent on the Earth over
Africa.
Europe.
Antarctica.
North America. - Answers - Antarctica.
