CHM 1020 - Final Exam Study Guide questions
and answers 2025\2026 A+ Grade
The quantity 0.0000064 g expressed in scientific notation is ___________.
- correct answer 6.4 x 10^-6
A substance that can be broken down into 2 or more simpler substances only by chemical methods is
called a(n)
- correct answer compound
Which is not a mixture?
- correct answer sodium chloride
which substance is an element?
- correct answer N2
The majority of new smartphones being released have displays that are at least 5.00 inches in size. What
is this size in centimeters? (There are 2.54 cm in one inch.)
- correct answer 12.7 cm
which one of the following is a subatomic particle located in the center of the atom and has a positive
charge?
- correct answer Proton
What are the three pillars of sustainability?
- correct answer Environmental, social, economic
Oxidation and reduction of atoms involves a change in the number of __________ in the atom.
- correct answer Electrons
,One of the lightest smartphones on the market today weighs 113 g. To protect your phone, you may
want to use a screen protector, which weighs 27.2 g, and a heavy duty case which weighs 114 g. What is
the total weight of the phone, screen protector, and case?
- correct answer 254 g
2.3 x 10^6 meters is the same _________________ meters.
- correct answer 2,300,000
How many protons and neutrons, respectively, are in an atom of chlorine (mass #35)?
- correct answer Protons: 17
Neutrons: 18
For the Ionic compound NaCl, what is the charge on the sodium ion?
- correct answer + 1
Which of the following is a diatomic molecule: Hydrogen (H2), Aluminum (Al), Sulfur(S8) or Carbon (C)?
- correct answer Hydrogen (H2)
What is the correct answer to the following problem (w. the correct # of significant figures)(3..123)
+ 45.7 = ?
- correct answer 72
One of the 3 pillars of sustainability, resulting in a better quality of life for all
- correct answer Social
The Atomic # of fluorine
- correct answer 9
Anything that occupies space and has mass
- correct answer matter
Tea would be an example of a
- correct answer Homogeneous Mixture
, A molecule composed of a metal atom and a nonmetal atom
- correct answer Ionic
The quantity 8.7 x10^5 g expressed in a standard decimal notation.
- correct answer 870,000 g
On a Periodic Table, the column of elements with similar properties are
- correct answer groups
The most numerous of the elements are the
- correct answer metals
Which is not a pure substance?
- correct answer air
Which one of the following is a subatomic particle located in the center of the atom and has no charge?
- correct answer neutrons
A computer chip was weighed and found to have a mass of 23.3040 g. How many significant figures does
this number have?
- correct answer 6
A substance that can be broken down into two or more simpler substances only by chemical method is
called a
- correct answer compound
Which differentiates a compound from a mixture of two or more elements?
- correct answer A compound does not exhibit the individual properties of the elements of which it is
composed
How many protons, neutrons, and electrons are there in a neutral atom of 19/9 F?
- correct answer 9, 10, 9
and answers 2025\2026 A+ Grade
The quantity 0.0000064 g expressed in scientific notation is ___________.
- correct answer 6.4 x 10^-6
A substance that can be broken down into 2 or more simpler substances only by chemical methods is
called a(n)
- correct answer compound
Which is not a mixture?
- correct answer sodium chloride
which substance is an element?
- correct answer N2
The majority of new smartphones being released have displays that are at least 5.00 inches in size. What
is this size in centimeters? (There are 2.54 cm in one inch.)
- correct answer 12.7 cm
which one of the following is a subatomic particle located in the center of the atom and has a positive
charge?
- correct answer Proton
What are the three pillars of sustainability?
- correct answer Environmental, social, economic
Oxidation and reduction of atoms involves a change in the number of __________ in the atom.
- correct answer Electrons
,One of the lightest smartphones on the market today weighs 113 g. To protect your phone, you may
want to use a screen protector, which weighs 27.2 g, and a heavy duty case which weighs 114 g. What is
the total weight of the phone, screen protector, and case?
- correct answer 254 g
2.3 x 10^6 meters is the same _________________ meters.
- correct answer 2,300,000
How many protons and neutrons, respectively, are in an atom of chlorine (mass #35)?
- correct answer Protons: 17
Neutrons: 18
For the Ionic compound NaCl, what is the charge on the sodium ion?
- correct answer + 1
Which of the following is a diatomic molecule: Hydrogen (H2), Aluminum (Al), Sulfur(S8) or Carbon (C)?
- correct answer Hydrogen (H2)
What is the correct answer to the following problem (w. the correct # of significant figures)(3..123)
+ 45.7 = ?
- correct answer 72
One of the 3 pillars of sustainability, resulting in a better quality of life for all
- correct answer Social
The Atomic # of fluorine
- correct answer 9
Anything that occupies space and has mass
- correct answer matter
Tea would be an example of a
- correct answer Homogeneous Mixture
, A molecule composed of a metal atom and a nonmetal atom
- correct answer Ionic
The quantity 8.7 x10^5 g expressed in a standard decimal notation.
- correct answer 870,000 g
On a Periodic Table, the column of elements with similar properties are
- correct answer groups
The most numerous of the elements are the
- correct answer metals
Which is not a pure substance?
- correct answer air
Which one of the following is a subatomic particle located in the center of the atom and has no charge?
- correct answer neutrons
A computer chip was weighed and found to have a mass of 23.3040 g. How many significant figures does
this number have?
- correct answer 6
A substance that can be broken down into two or more simpler substances only by chemical method is
called a
- correct answer compound
Which differentiates a compound from a mixture of two or more elements?
- correct answer A compound does not exhibit the individual properties of the elements of which it is
composed
How many protons, neutrons, and electrons are there in a neutral atom of 19/9 F?
- correct answer 9, 10, 9
