Chemistry

Question 1

What is the basic unit of matter?

Answer 1

Atom

Question 2

True or False: Atoms are made up of protons, neutrons, and electrons.

Answer 2

True

Question 3

Fill in the blank: The center of an atom is called the ______.

Answer 3

nucleus

Question 4

What charge do protons have?

Answer 4

Positive charge

Question 5

What is the charge of electrons?

Answer 5

Negative charge

Question 6

Which subatomic particle has no charge?

Answer 6

Neutron

Question 7

What is the term for a substance made of only one type of atom?

Answer 7

Element

Question 8

True or False: A compound is made up of two or more different types of atoms chemically bonded together.

Answer 8

True

Question 9

What is the chemical formula for water?

Answer 9

H2O

Question 10

What do we call a mixture that is uniform throughout?

Answer 10

Homogeneous mixture

Question 11

What is an example of a heterogeneous mixture?

Answer 11

Salad

Question 12

What is the process of a solid turning directly into a gas called?

Answer 12

Sublimation

Question 13

Fill in the blank: The ______ is the smallest unit of a compound that retains its chemical properties.

Answer 13

molecule

Question 14

What is the pH range of acids?

Answer 14

Less than 7

Question 15

What is the pH range of bases?

Answer 15

Greater than 7

Question 16

True or False: Neutral substances have a pH of 7.

Answer 16

True

Question 17

What is the law that states matter cannot be created or destroyed?

Answer 17

Law of Conservation of Mass

Question 18

What is the process of a liquid turning into a gas called?

Answer 18

Evaporation

Question 19

What do we call a chemical reaction that absorbs heat?

Answer 19

Endothermic reaction

Question 20

What do we call a chemical reaction that releases heat?

Answer 20

Exothermic reaction

Question 21

Fill in the blank: The periodic table organizes elements based on their ______.

Answer 21

atomic number

Question 22

What information does the atomic number of an element provide?

Answer 22

Number of protons in the nucleus

Question 23

What are vertical columns in the periodic table called?

Answer 23

Groups or families

Question 24

What are horizontal rows in the periodic table called?

Answer 24

Periods

Question 25

Which group of elements is known as the noble gases?

Answer 25

Group 18

Question 26

True or False: Metals are typically good conductors of electricity.

Answer 26

True

Question 27

What is the main characteristic of nonmetals?

Answer 27

They are poor conductors of heat and electricity.

Question 28

What is the term for a chemical bond formed by the sharing of electrons?

Answer 28

Covalent bond

Question 29

What is the term for a chemical bond formed by the transfer of electrons?

Answer 29

Ionic bond

Question 30

Fill in the blank: A solution is made when a solute is dissolved in a ______.

Answer 30

solvent

Question 31

What is the most common solvent?

Answer 31

Water

Question 32

What is concentration in a solution?

Answer 32

The amount of solute in a given volume of solvent.

Question 33

What do we call a change in a substance that does not change its chemical composition?

Answer 33

Physical change

Question 34

What is a chemical change?

Answer 34

A change that results in the formation of new substances.

Question 35

True or False: Rusting is an example of a chemical change.

Answer 35

True

Question 36

What is the main purpose of a catalyst in a chemical reaction?

Answer 36

To speed up the reaction without being consumed.

Question 37

What is the unit of measurement for mass in the metric system?

Answer 37

Gram

Question 38

What is the unit of measurement for volume in the metric system?

Answer 38

Liter

Question 39

Fill in the blank: The temperature at which a solid becomes a liquid is called the ______.

Answer 39

melting point

Question 40

What is the temperature at which a liquid becomes a gas called?

Answer 40

Boiling point

Question 41

What do we call the process of separating a mixture using a filter?

Answer 41

Filtration

Question 42

What is chromatography used for?

Answer 42

To separate mixtures based on different affinities.

Question 43

What is the main focus of chemistry?

Answer 43

The study of matter and its interactions.