Quiz about Atoms Molecules Compounds

Question 1

A substance with two or more different types of atoms bonded together is called...

Accepted Answer

A compound

Answer

An element

Answer

An atom

Answer

A mixture

Question 2

In this diagram, X represents...

Accepted Answer

An element

Answer

A compound

Answer

A mixture

Answer

An atom

Question 3

In this diagram, Y represents...

Accepted Answer

molecules of a compound

Answer

elements of a molecule

Answer

compounds of mixtures

Answer

A mixture

Question 4

In this diagram, W represents...

Accepted Answer

A mixture

Answer

An element

Answer

A molecule

Answer

A compound

Question 5

This diagram represents...

Accepted Answer

A mixture of elements and compounds

Answer

An element

Answer

A molecule

Answer

A compound

Question 6

Which example is a compound?

Accepted Answer

H2O2

Answer

N2

Answer

O2

Answer

Cu

Question 7

Salt and pepper is an example of...

Accepted Answer

A mixture

Answer

An element

Answer

A compound

Answer

A molecule

Question 8

Two or more atoms joined together create a....?

Accepted Answer

Molecule

Answer

Element

Answer

Compound

Answer

Mixture

Question 9

This diagram represents...

Accepted Answer

An element

Answer

A molecule

Answer

A compound

Answer

A mixture

Question 10

This diagram represents...

Accepted Answer

A mixture

Answer

An element

Answer

A compound

Answer

A molecule

Question 11

O₃ (ozone), a layer found in the stratosphere which absorbs dangerous UV light from the sun, is an example of...

Accepted Answer

A molecule of an element

Answer

A molecule of a compound

Answer

A compound

Answer

A mixture

Question 12

This diagram represents...

Accepted Answer

Molecules of a compound

Answer

A mixture of elements

Answer

Molecules of an element

Answer

An element

Question 13

CaCO₃is an example of...

Accepted Answer

A molecule of compound

Answer

An element

Answer

An element of a molecule

Answer

A mixture

Question 14

How many total atoms are is 3CO₄?

Accepted Answer

15

Answer

20

Answer

3

Answer

12

Question 15

How many atoms of hydrogen are in 5H₂O?

Accepted Answer

10

Answer

15

Answer

30

Answer

5

Question 16

How many total atoms are in 4NO?

Accepted Answer

8

Answer

4

Answer

12

Answer

16

Question 17

How many molecules of water are in this chemical formula: 2H₂O?

Accepted Answer

2

Answer

4

Answer

6

Answer

8

Question 18

What does the coeffecient tell us?

Accepted Answer

The number of molecules in a formula

Answer

The number of atoms in an element

Answer

The number of protons in the nucleus of an atom

Answer

The number of electrons in the nucleus of an atom

Question 19

Which of the following is a sign that a chemical reaction has occurred?

Accepted Answer

formation of a gas

Answer

change in shape

Answer

melting

Answer

dissolving

Question 20

Is melting butter for popcorn a chemical or physical change?

Accepted Answer

physical

Answer

chemical

Question 21

Is burning wood a chemical or physical change?

Accepted Answer

chemical

Answer

physical

Question 22

A change in the size, shape, or state of matter.

Accepted Answer

physical change

Answer

chemical change

Answer

chemical reaction

Answer

electron change

Question 23

Adding baking soda and vinegar together and it fizzes and creates carbon dioxide.

Accepted Answer

Chemical

Answer

Physical

Question 24

What is the evidence of the chemical change seen here?

Accepted Answer

Light produced

Answer

Color change

Answer

state change

Answer

mixture

Question 25

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

Accepted Answer

melting ice

Answer

burning match

Answer

a car rusting

Answer

baking a cake

Question 26

When two substances are mixed, they might form a new substance.  Which of the following would indicate that a new substance has been formed?

Accepted Answer

The temperature of the mixture decreases.

Answer

The volume of the mixture increases.

Answer

The mass of the mixture increases.

Answer

One of the substances dissolves.

Question 27

All of the following are evidence of a chemical change EXCEPT-

Accepted Answer

change in state of matter

Answer

formation of a gas

Answer

color change

Answer

precipitate forms

Question 28

Ripping up paper ...

Accepted Answer

Physical Change

Answer

Chemical Change

Question 29

Bubbles form when two or more substances are combined ...

Accepted Answer

Chemical Change

Answer

Physical Change

Question 30

A change in phase ...

Accepted Answer

Physical Change

Answer

Chemical Change

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