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ELEMENT, COMPOUND AND MIXTURE

Total questions: 45

Worksheet time: 24mins

Name
Class
Date
1.
a)

Element

b)

Compound

c)

Homogeneous Mixture

d)

Heterogeneous Mixture

2.

Sweet Tea, everything is mixed evenly and looks the same.

a)

Heterogeneous Mixture

b)

Homogeneous Mixture

3.

H2 is an example of a(n)...

a)

Element

b)

Compound

c)

Molecule

d)

Heterogeneous Mixture

4.
a)

Element

b)

Compound

c)

Homogeneous Mixture

d)

Heterogeneous Mixture

5.
a)

Element

b)

Compound

c)

Homogeneous Mixture

d)

Heterogeneous Mixture

6.

A molecule is created when the same _________ is bonded together. For example: C10

a)

Element

b)

Compound

c)

Homogeneous Mixture

d)

Heterogeneous Mixture

7.
a)

Element

b)

Compound

c)

Homogeneous Mixture

d)

Heterogeneous Mixture

8.
a)

Element

b)

Compound

c)

Homogeneous Mixture

d)

Heterogeneous Mixture

9.
a)

Element

b)

Compound

c)

Homogeneous Mixture

d)

Heterogeneous Mixture

10.
a)

Homogeneous Mixture

b)

Heterogeneous Mixture

11.

2 or more different elements that are bonded together is called...

a)

A. element

b)

B. compound

c)

C. mixture

d)

D. solution

12.
A substance that contains only one type of atom is a(n)
a)
compound
b)
element
c)
heterogeneous mixture
d)
homogeneous mixture
13.
Is salt (NaCI) a compound or a element
a)
Compound
b)
element
14.

What is CO2 and example of?

a)

element

b)

molecule

c)

compound

15.
Which of the following lists only elements?
a)
H2O + OH, MgCl2
b)
H2O, KF, Ne
c)
KCl, Ag, Au
d)
K, Cl, N
16.

Jay combines water, sugar, and lemon juice to form lemonade. What type of substance was made?

a)

Element

b)

Molecule

c)

Mixture

17.
Which of the following is an example of a heterogenous mixture?
a)
soap
b)
a salad with lettuce, olives, and tomatoes
c)
cup of coffee
d)
water
18.
Which of the following selections are the different types of mixtures?
a)
heterogenous, homogenous
b)
acid, base
c)
metal, nonmetal
d)
element, compound
19.
This type of mixture looks the same throughout. 
a)
Homogenous
b)
Heterogeneous
20.

Which of the following is an example of the formation of a mixture?

a)

Rust forming on an iron nail.

b)

Sugar crystals dissolving in water.

c)

Sodium and chlorine forming table salt.

d)

Hydrogen and oxygen reacting to produce oxygen.

21.

Which statement identifies why oxygen is classified as a pure substance and air is classified as a mixture?

a)

Oxygen is more reactive than air.

b)

Oxygen has a higher density than air.

c)

Oxygen goes under a phase change, whereas air is always a gas.

d)

Oxygen contains only one substance, but air contains several substances.

22.

Which of the following is an example of of a container filled with a pure substance rather than with a mixture?

a)

A tire filled with air.

b)

A jar filled with salt water.

c)

A balloon filled with helium.

d)

A glass filled with chocolate milk.

23.

When electricity passes through water, hydrogen and oxygen are produced. Which table correctly labels the compounds and elements involved in the process?

a)

Water-->Compound

Hydrogen-->Compound

Oxygen--->Element

b)

Water-->Compound

Hydrogen--->Element

Oxygen--->Compound

c)

Water--->Compound

Hydrogen--->Element

Oxygen--->Element

24.

The chemical equation shown below represents a reaction that produces fuel for certain cars.

CO + H2O------->CO2 + H2


Which substance in this equation is classified as an element?

a)

CO

b)

O2

c)

CO2

d)

H2

25.

Which changes MUST happen for elements to become a compound?

a)

elements are heated

b)

a gas becomes a liquid

c)

elements dissolve in water

d)

chemical bonds form between atoms.

26.

Water (H2O), is not found on the periodic table because water is a...

a)

atom

b)

liquid

c)

mixture

d)

compound

27.

Which of the following explains why saltwater is considered a mixture?

a)

It is composed of one element.

b)

It is composed of one compound.

c)

It is composed of two or more substances and has new chemical properties.

d)

It is composed of two or more substances and retains their own chemical properties.

28.

Oxygen and iron combine chemically to form rust. Rust is classified as which of the following?

a)

an atom.

b)

an element.

c)

a compound.

d)

a mixture.

29.

When the elements copper (Cu) and oxygen (O) chemically combine, they form...

a)

an ion

b)

a gas

c)

a compound

d)

a mixture

30.

This image is a model of...

a)

an element

b)

a compound

c)

a homogenous mixture

d)

a heterogeneous mixture

31.

This picture is a model of...

a)

an element

b)

a compound

c)

a homogenious mixture

d)

a heterogeneous mixture.

32.

This picture is a model of a...

a)

element

b)

compound

c)

homogeneous mixture

d)

heterogeneous mixture

33.

The image below is an example of

a)

an atom

b)

a molecule

c)

a homogeneous mixture

d)

a heterogeneous mixture

34.

The image below is an example of

a)

a homogeneous mixture

b)

a compound

c)

a heterogeneous mixture

d)

an element

35.
A pure substance that cannot be separated into simpler substances by chemical or physical means.  
a)
Element
b)
Compound
c)
Mixture
d)
Chemical
36.
These contain only one kind of atom. 
a)
element 
b)
compound 
c)
mixture 
d)
water 
37.
A compound is made of ________ atoms. 
a)
big 
b)
similar 
c)
different 
38.
Carbon Dioxide is a ______ 
a)
compound 
b)
element 
c)
mixtures 
d)
Battle of Bunker Hill 
39.
Which of the following represents an element?
a)
H2O
b)
H2
c)
NaCl
d)
CaCO3
40.
This picture represents which of the following?
a)
element
b)
compound
c)
mixture of elements
d)
mixture of compounds
41.
Iced Tea (with ice in it)
a)
Element
b)
Compound
c)
Heterogenous Mixture
d)
Solution
42.
Salt Water
a)
Element
b)
Compound
c)
Heterogeneous Mixture
d)
Solution
43.
Milk is a 
a)
solution
b)
suspension
c)
colloid
44.
When elements form mixtures, the elements keep their original properties. 
a)
True
b)
False
45.
Which of the following would be an example of a chemical formula:
a)
C6H12O6
b)
F= ma
c)
2 H2 + O2 -> 2 H2O
d)
6.02 x 10 23

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