Quiz about Chemistry Review

Question 1

Chemistry is the study of matter and the changes that matter undergoes.

Accepted Answer

True

Answer

False

Question 2

Define a physical change.

Accepted Answer

A change to a substance that occurs without forming a new substance.

Answer

A change in matter that produces one or more new substances.

Answer

A change that undergoes a chemical reaction.

Answer

None of the above.

Question 3

Define a chemical change.

Accepted Answer

A change in matter that produces one or more new substances.

Answer

A change to a substance that occurs without forming a new substance.

Answer

A change that doesn't form something new.

Answer

None of the above.

Question 4

Which of the following is NOT a compound?

Accepted Answer

Answer

Answer

Answer

Question 5

Which of the following represents an element?

Accepted Answer

Answer

$$H_{2_{ }}O$$

Answer

Answer

Question 6

What cannot be broken down into other substances?

Accepted Answer

element

Answer

compound

Answer

solids

Answer

mixture

Question 7

What is made up of two or more elements that are chemically combined?

Accepted Answer

compound

Answer

element

Answer

mixture

Answer

solid

Question 8

Ripping paper is an example of...

Accepted Answer

a physical change

Answer

a chemical change

Answer

both

Answer

neither

Question 9

Cooking an egg is an example of ...

Accepted Answer

a chemical change

Answer

a physical change

Answer

neither

Answer

both

Question 10

Rust forming over time is an example of ...

Accepted Answer

a chemical change

Answer

a physical change

Answer

both

Answer

neither

Question 11

Which of the following is NOT an example of a physical change?

Accepted Answer

sour milk

Answer

crumpled paper

Answer

shrunken clothing

Answer

pencil sharpening

Question 12

Green bananas turning yellow on their own as they ripen is an example of a

Accepted Answer

chemical change

Answer

physical change

Answer

both

Answer

neither

Question 13

An unexpected changing of color is a sign of a _____ change.

Accepted Answer

chemical

Answer

physical

Answer

physical and chemical

Answer

regular

Question 14

The smallest unit of an element that retains the properties of that element is called a(n)

Accepted Answer

Atom

Answer

Element

Answer

Compound

Answer

Molecule

Question 15

Which of the following is NOT a pure substance?

Accepted Answer

Mixture

Answer

Element

Answer

Compound

Answer

Molecule

Question 16

Which property of a substance is not affected by a physical change?

Accepted Answer

Reactivity

Answer

Size

Answer

Position

Answer

Shape

Question 17

The different substances in a mixture

Accepted Answer

keep their physical properties

Answer

form new molecules

Answer

cannot be separated

Answer

combine chemically

Question 18

Which of the following is NOT a potential sign of chemical change?

Accepted Answer

Boiling

Answer

Change in odor

Answer

Fizzing

Answer

Change in color

Question 19

Which of the following causes a chemical change?

Accepted Answer

Burning

Answer

Moving

Answer

Melting

Answer

Shattering

Question 20

Unlike a mixture, a pure substance has

Accepted Answer

A fixed composition

Answer

Atoms

Answer

Molecules

Answer

A specific size

Question 21

Which of the following is a homogeneous mixture?

Accepted Answer

Milk

Answer

Diamond

Answer

Sulfuric Acid

Answer

Iron

Question 22

Which of the following is a heterogeneous mixture?

Accepted Answer

Oil and water

Answer

Ammonia

Answer

Bronze

Answer

Carbon dioxide

Question 23

Which branch of chemistry involves the study of non-organic substances?

Accepted Answer

Inorganic chemistry

Answer

Organic chemistry

Answer

Biochemistry

Answer

Analytical chemistry

Question 24

A mixture is a blend of 2 or more kinds of matter which can be physically separated. If the 2 types of matter are not evenly distributed, the mixture is said to be _____.

Accepted Answer

heterogeneous

Answer

homogeneous

Question 25

Part of your lab instructions might be to add a salt to a sample of water. The salt dissolves in the water, but you would still taste it. What type of mixture did you make?

Accepted Answer

a homogeneous solution

Answer

a heterogeneous sol

Answer

a heterogeneous suspension

Answer

a homogeneous gel

Question 26

A balloon filled with only helium gas, H₂. The balloon contains a _____.

Accepted Answer

Pure substance

Answer

Homogeneous mixture

Answer

Heterogeneous mixture

Answer

Solution

Question 27

Look at this picture of Argon off the periodic table. Which of the following is true for this element?

Accepted Answer

18 protons

Answer

40 protons

Answer

22 protons

Answer

21.9 protons

Question 28

Look at this picture of Argon off the periodic table. Which of the following is true for this element?

Accepted Answer

22 neutrons

Answer

18 neutrons

Answer

40 neutrons

Answer

21.9 neutrons

Question 29

Look at this picture of Argon off the periodic table. Which of the following is true for this element when it is neutral?

Accepted Answer

18 electrons

Answer

40 electrons

Answer

22 electrons

Answer

21.9 electrons

Question 30

Which part of an atom is used to identify it?

Accepted Answer

Number of protons

Answer

Number of neutrons

Answer

Number of electrons

Answer

Atomic mass

Question 31

When you two atoms with different masses, Carbon-12 and Carbon-13 for example, what type of atom do you have?

Accepted Answer

Isotope

Answer

Neutral atom

Answer

Ion

Answer

Molecule

Question 32

When you have an ion of an atom, O^-2 for example, what has changed in the atomic structure?

Accepted Answer

Number of electrons

Answer

Number of protons

Answer

Number of neutrons

Answer

Atomic mass

Question 33

The atomic mass of an atom is equal to ____.

Accepted Answer

number of protons plus number of neutrons

Answer

number of protons plus number of electrons

Answer

number of electrons plus the number of neutrons

Answer

number of protons

Question 34

If an atom contains exactly three protons, then it's an atom of _____

Accepted Answer

lithium

Answer

gold

Answer

nitrogen

Answer

carbon

Question 35

If an atom contains exactly five protons, then it's an atom of _____

Accepted Answer

boron

Answer

oxygen

Answer

nitrogen

Answer

hydrogen

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