Question 1

Which of the following is a heterogeneous mixture?

Accepted Answer

A)  Antifreeze (a mixture of water and ethylene glycol) 
B)  Blood 
C)  Sugar water 
D)  Gasoline 
E)  Vinegar (a mixture of acetic acid and water)

Question 2

A battery-operated power tool,such as a cordless drill,converts

Accepted Answer

A)  electrostatic energy to chemical potential energy. 
B)  mechanical energy to electrostatic energy. 
C)  thermal energy to mechanical energy. 
D)  thermal energy to gravitational energy. 
E)  chemical potential energy to mechanical energy.

Question 3

Which of the following statements is true of a chemical equation?

Accepted Answer

A)  It is a representation of only a physical change rather than a chemical or molecular change. 
B)  It shows that the reactants on the left side of an equation produce the products on the right side of the equation. 
C)  The number of atoms found in the reactants doubles in the products. 
D)  The number of atoms found in the reactants halves in the products. 
E)  The identity of the substance in a chemical equation is preserved.

Question 4

A(n)________ is a pure substance that is composed of only one type of atom.

Accepted Answer

A)  ion 
B)  solution 
C)  element 
D)  molecule 
E)  gas

Question 5

Which one of the following substances is classified as a chemical compound?

Accepted Answer

A)  Ir 
B)  He 
C)  Ho 
D)  HI 
E)  In

Question 6

A pure substance composed of two or more different elements is a(n)________.

Accepted Answer

A)  ion 
B)  heterogeneous mixture 
C)  chemical compound 
D)  solid 
E)  solution

Question 7

Many regulators,environmentalists,and citizens around the world believe that ________ development is required to meet today's economic and environmental needs while preserving the options for future generations to meet theirs.

Accepted Answer

The answer of Many regulators,environmentalists,and citizens around the world believe...

Question 8

What is the symbol for the element iron?

Accepted Answer

A)  Fe 
B)  Kr 
C)  Ca 
D)  C 
E)  N

Question 9

The ________ of a substance is defined as its mass per unit volume.

Accepted Answer

The answer of The ________ of a substance is defined...

Question 10

Which of the following are extensive properties: mass,volume,and/or density?

Accepted Answer

A)  mass only 
B)  volume only 
C)  density only 
D)  mass and volume 
E)  volume and density

Question 11

Which of the following terms best describes ammonia,NH3?

Accepted Answer

A)  Homogeneous mixture 
B)  Ion 
C)  Element 
D)  Chemical compound 
E)  Atom

Question 12

A hypothesis is a _____.

Accepted Answer

A)  concise statement of behavior that is always the same under the same conditions 
B)  set of quantitative data 
C)  tentative explanation or predication based upon experimental observations 
D)  well-tested unifying principle that explains a body of facts 
E)  mathematical formula that models a pattern of behavior

Question 13

What is the correct symbol for silver?

Accepted Answer

A)  S 
B)  Si 
C)  Ag 
D)  Sr 
E)  Au

Question 14

What kind of change is depicted below?

Accepted Answer

A)  no change 
B)  chemical change 
C)  both chemical and physical change 
D)  physical change

Question 15

What is the correct symbol for potassium?

Accepted Answer

A)  P 
B)  Pm 
C)  K 
D)  Pt 
E)  Po

Question 16

A(n)________ is the smallest particle of an element that retains the characteristic chemical properties of that element.

Accepted Answer

The answer of A(n)________ is the smallest particle of an...

Question 17

An electrically charged atom or group of atoms is a(n)________.

Accepted Answer

A)  element 
B)  ion 
C)  molecule 
D)  heterogeneous mixture 
E)  solution

Question 18

Which of the following is not a correct name-symbol combination? ​

Accepted Answer

A)  magnesium,Mg 
B)  nickel,Ni 
C)  phosphorus,P 
D)  krypton,Kr 
E)  potassium,Co

Question 19

Substances like hydrogen (H₂)and oxygen (O₂)that are composed of only one type of atom are classified as ________.

Accepted Answer

The answer of Substances like hydrogen (H₂)and oxygen (O₂)that are...

Question 20

The element whose symbol is Sn is

Accepted Answer

A)  tin. 
B)  calcium. 
C)  calcium... 
D)  calcium.. 
E)  none of these.

Exam 1: Basic Concepts of Chemistry

Which of the following is a heterogeneous mixture?

A battery-operated power tool,such as a cordless drill,converts

Which of the following statements is true of a chemical equation?

A(n) ________ is a pure substance that is composed of only one type of atom.

Which one of the following substances is classified as a chemical compound?

A pure substance composed of two or more different elements is a(n) ________.

Many regulators,environmentalists,and citizens around the world believe that ________ development is required to meet today's economic and environmental needs while preserving the options for future generations to meet theirs.

What is the symbol for the element iron?

The ________ of a substance is defined as its mass per unit volume.

Which of the following are extensive properties: mass,volume,and/or density?

Which of the following terms best describes ammonia,NH₃?

A hypothesis is a _____.

What is the correct symbol for silver?

What kind of change is depicted below?

What is the correct symbol for potassium?

A(n)________ is the smallest particle of an element that retains the characteristic chemical properties of that element.

An electrically charged atom or group of atoms is a(n) ________.

Which of the following is not a correct name-symbol combination?

Substances like hydrogen (H₂)and oxygen (O₂)that are composed of only one type of atom are classified as ________.

The element whose symbol is Sn is

Exam 1: Basic Concepts of Chemistry

Which of the following is a heterogeneous mixture?

A battery-operated power tool,such as a cordless drill,converts

Which of the following statements is true of a chemical equation?

A(n) ________ is a pure substance that is composed of only one type of atom.

Which one of the following substances is classified as a chemical compound?

A pure substance composed of two or more different elements is a(n) ________.

Many regulators,environmentalists,and citizens around the world believe that ________ development is required to meet today's economic and environmental needs while preserving the options for future generations to meet theirs.

What is the symbol for the element iron?

The ________ of a substance is defined as its mass per unit volume.

Which of the following are extensive properties: mass,volume,and/or density?

Which of the following terms best describes ammonia,NH3?

A hypothesis is a _____.

What is the correct symbol for silver?

What kind of change is depicted below?

What is the correct symbol for potassium?

A(n)________ is the smallest particle of an element that retains the characteristic chemical properties of that element.

An electrically charged atom or group of atoms is a(n) ________.

Which of the following is not a correct name-symbol combination? ​

Substances like hydrogen (H2)and oxygen (O2)that are composed of only one type of atom are classified as ________.

The element whose symbol is Sn is

Which of the following terms best describes ammonia,NH₃?

Which of the following is not a correct name-symbol combination?

Substances like hydrogen (H₂)and oxygen (O₂)that are composed of only one type of atom are classified as ________.