wayground logo

Free Printable Worksheets

Font size

S
M
L
XL
Worksheets

Year 8 Chemistry Revision

Total questions: 60

Worksheet time: 35mins

Name
Class
Date
1.

1. ___________ are the smallest unit of an element that maintains the properties of that element.

a)

Atoms

b)

Elements

c)

Compounds

d)

mixtures

2.

2. A/An _______________ is made up of one or more of the same kind of atom chemically combined.

a)

atom

b)

element

c)

compound

d)

molecule

3.

3. A/an _____________ contains a variety of elements and compounds that are not chemically combined with each other.

a)

atom

b)

element

c)

compound

d)

mixture

4.

4. A __________________ is a substance that has definite physical and chemical properties such as appearance, melting point, and reactivity.

a)

mixture

b)

pure substance

c)

compound

d)

element

5.

5. True or False: elements and compounds are pure substances.

a)

True

b)

False

6.

6. Elements are broadly classified as metals, nonmetals, and _________________.

a)

compounds

b)

mixtures

c)

metalloids

7.

7. Coffee, mouthwash, and vinegar are examples of __________________ mixtures.

a)

heterogeneous

b)

homogeneous

c)

pure substances

8.

8. Baking soda is the common name for sodium bicarbonate, or NaHCO3. It can be produced through chemical reactions involving carbon dioxide and sodium hydroxide. It is a

a)

pure substance

b)

mixture

9.

9. Blood is a fluid found in the bodies of humans and other animals. It can be physically separated into plasma, red blood cells and white blood cells. Blood is a ___________________

a)

pure substance

b)

mixture

10.

10. Ammonia is a colourless gas with the formula NH3. Ammonia contains hydrogen and nitrogen and cannot be broken down physically. Ammonia is a ___________________ .

a)

compound

b)

element

11.

A salad is an example of a

a)

Pure substance

b)

Solution

c)

Boring choice of food

d)

Mixture

12.

Which of the following is not a pure substance?

a)

Gold

b)

Fruit juice

c)

Diamond

d)

Table salt

13.
Is sugar (C12H22O11) an element or a compound?
a)
Element
b)
Compound
14.
Which of the following is not a compound?
a)
HCl
b)
Cl
c)
NaCl
d)
CO2
15.
Which of the following represents an element?
a)
H2O
b)
H2
c)
NaCl
d)
CaCO3
16.
What cannot be broken down into other substances?
a)
Compound
b)
Mixture
c)
Solids
d)
Element
17.

Which of the following is an example of a chemical element?

a)

sodium chloride (NaCl)

b)

water (H2O)

c)

nitrogen (N)

d)

glucose (C6H12O6)

18.

Look carefully at the following chemical formulas:

CaCO3 NaHCO3 MgSO4

How many different elements are shown in these three formulas?

a)

3

b)

7

c)

10

d)

17

19.

Which container(s) hold a pure substance?

a)

A

b)

B

c)

C

d)

D

20.

Which container(s) hold a mixture?

a)

A

b)

B

c)

C

d)

D

21.

Which container(s) hold an element?

a)

A

b)

B

c)

C

d)

D

22.

What is the difference between the substances represented by the symbols Co and CO?

a)

They are two different ways to represent the element cobalt.

b)

One is the symbol for an element, and one is a formula for a compound.

c)

Co represents the element cobalt, and CO represents the element copper

d)

They represent two substances, each made up of two elements

23.

Name a relationship between atoms and elements

a)

Atoms make up matter and elements have atoms in them

b)

Elements are smaller than atoms and atoms are made up of elements

c)

Atoms are also called elements

24.

What three groups are elements classified in?

a)

nonmetals, metalloids, metals

b)

varieties, pure substances, compounds

c)

solubility, malleability, electrical conductivity

25.

How many different atoms are in a compound?

a)

1

b)

2 only

c)

2 or more

26.

Elements are represented by a...

a)

More than one capital letter

b)

chemical symbol

c)

chemical formula

d)

oxygen

27.
Carbon is considered an element while carbon dioxide is considered a compound. This is because carbon dioxide is –
a)
a gas at room temperature.
b)
made of two different elements.
c)
given off by green plants.
28.
A section of the Periodic Table of Elements is provided. What is the chemical symbol for magnesium?
a)
Mn
b)
Magnesium
c)
Mg
d)
12
29.
Compounds are different than elements because compounds are -
a)
A combination of two or more elements.
b)

B)not able to be broken down into parts
c)
made from the same type of atoms
d)
a pure substance, elements are not
30.
Use the periodic table to determine the Chemical symbol for Iron.
a)
 Ir
b)
FE
c)
Fe
d)
I
31.
The smallest particle of any particular type of matter is known by which of the following terms?
a)
Element
b)
Chemical
c)
Atom
d)
Substance
32.

Element, mixture, or compound?

a)

element

b)

mixture

c)

compound

33.

Element, mixture, or compound?

a)

element

b)

mixture

c)

compound

34.

What do you see in this picture?

a)

A pure element

b)

A pure compound

c)

A mixture of two elements

d)

A mixture of two compounds

e)

A mixture of an element and a compound

35.

What do you see in this picture?

a)

A pure element

b)

A pure compound

c)

A mixture of two elements

d)

A mixture of two compounds

e)

A mixture of an element and a compound

36.
What is the chemical symbol for the element hydrogen
a)
H
b)
He
c)
h
d)
he
37.
What is the chemical symbol for the element Carbon
a)
ca
b)
co2
c)
C
d)
Cd
38.

Which is the best example of a pure substance?

a)

pizza

b)

gold

c)

saltwater

d)

air

39.

Which substance is a compound?

a)

copper

b)

magnesium

c)

saltwater

d)

water

40.

A combination of substances that are not chemically combined is called a

a)

mixture

b)

compound

c)

element

41.

Structural differences between different chemicals can be represented in models of the particles. Which drawing BEST represents a compound?

a)

Picture A

b)

Picture B

c)

Picture C

d)

Picture D

42.

Is salt (NaCI) a compound or an element?

a)

Compound

b)

element

43.
All matter is made of .....
a)
energy 
b)
atoms 
c)
air
d)
chemistry
44.

Which of the above figures is/are considered a mixture

a)

A. K only

b)

B. M only

c)

C. L and M only

d)

D. K, L and M

45.

Which of diagram represents(s) an element?

a)

A. W only

b)

B. Z only

c)

C. X and Z only

d)

D. X, Y and Z only

46.

Matter is best described as anything that has _________________ only

a)

A. masse

b)

B. mass and velocity

c)

C. mass and takes up space

d)

D. mass, density and exerts pressure

47.
The positive particles of an atom are 
a)
electrons 
b)
positrons 
c)
neutrons 
d)
protons 
48.
the central region of an atom where its neutrons and protons are is its 
a)
nucleus 
b)
electron cloud
c)
core 
d)
center 
49.
Particles in an atom that are neutral and have no charge are 
a)
negatrons 
b)
electrons 
c)
neutrons 
d)
protons 
50.

Most of the mass of an atom is found in the ______.

a)

nucleus

b)

proton

c)

electron cloud

d)

isotope

51.
electrons have this type of charge?
a)
negative
b)
positive
c)
neutral
52.
These particles orbit around the nucleus of an atom.  What are they called?
a)
electrons
b)
protons
c)
neutrons
d)
photons
53.
From the diagram, which particles are indicated with the arrow?
a)
electrons and protons
b)
protons and neutrons
c)
electrons and neutrons
d)
photons and nucleons
54.

How many electrons does this oxygen atom have?

a)

16

b)

8

c)

24

d)

6

55.

How many protons and electrons does nickel have?

a)

28

b)

58.69

56.

What is the atomic mass?

a)

58.693

b)

28

57.
Dilcia wants to know how drinking milk affects how tall a Monica grows. Which is the independent variable?
a)
Monica's growth
b)
drinking milk
58.
Ramone wants to know: does the distance a person kicks a soccer ball effect how well they will do on their math test.  What is the dependent variable?
a)
How far they kick the soccer ball
b)
who the person is
c)
how well they do on the math test
d)
Type of soccer ball.
59.

What is the INDEPENDENT variable? You are testing which type of paper airplane goes furthest?

a)

the paper used

b)

the type of paper airplane

c)

the distance of each plane's flight

d)

how hard the plane is thrown

60.

What is wrong with the graph?

a)

Missing axis label

b)

Should be a line graph

c)

Numbers are not in equal increments

d)

x and y axis need to be switched

Similar Resources on Wayground

UCEA C3 Structure & Bonding

65 questions

UCEA C3 Structure & Bonding

quiz

Worksheet

•

7th - 11th Grade

Què sé de Química? (2n ESO)

61 questions

Què sé de Química? (2n ESO)

quiz

Worksheet

•

8th Grade

Elements, Compounds, and Mixtures

55 questions

Elements, Compounds, and Mixtures

quiz

Worksheet

•

6th - 8th Grade

Physical & Chemical Properties/Changes + Atoms & Molecules

55 questions

Physical & Chemical Properties/Changes + Atoms & Molecules

quiz

Worksheet

•

7th - 9th Grade

Chemistry Review Quizizz

55 questions

Chemistry Review Quizizz

quiz

Worksheet

•

6th - 8th Grade

Weather and Environment Review

59 questions

Weather and Environment Review

quiz

Worksheet

•

6th - 9th Grade

Density: Practice & Review

56 questions

Density: Practice & Review

quiz

Worksheet

•

8th Grade

Quarter 2 Science Review

60 questions

Quarter 2 Science Review

quiz

Worksheet

•

8th Grade