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Elements, Compounds, Mixtures

Total questions: 74

Worksheet time: 2hrs 47mins

Name
Class
Date
1.

The circles and dots in the boxes here represent atoms of two different elements. Atoms touching each other are considered bonded to each other. Which box contains a mixture?

a)

Box A

b)

Box B

c)

Box C

d)

Box D

2.

Which of the following illustrations represents a pure substance?

a)
b)
c)
d)
3.

Sulfur (S), Oxygen ( O2O_2  ), water ( H2OH_2O  ) and sodium chloride (NaCl) are all examples of pure substances. Which of the following describes ALL pure substances?

a)

A pure substance consists of only one type of element.

b)

A pure substance has a definite chemical composition.

c)

A pure substance cannot be broken down into simpler substances.

d)

A pure substance is normally found as a solid at room temperature.

4.

Andy wants to study a compound in his science class. Which of these is a compound?

a)

salt

b)

iron

c)

helium

d)

hydrogen

5.

Which of the following is formed when two elements combine chemically?

a)

an atom

b)

a compound

c)

an electron

d)

a mixture

6.

Sugar is composed of carbon, hydrogen, and oxygen. Sugar is an example of which of the following?

a)

an atom

b)

a compound

c)

an electron

d)

a mixture

7.

In the following diagrams, the spheres represent particles. Different shadings represent different particles. Which of the following contains only one pure substance?

a)
b)
c)
d)
8.

Carlos was asked to bring an example of a mixture to class. Which of these should Carlos bring as his example?

a)

salt

b)

sugar

c)

salt water

d)

cold water

9.

An example of a heterogeneous mixture is

a)

soil

b)

sugar

c)

carbon monoxide

d)

carbon dioxide

10.

When sugar is dissolved in water, the resulting solution is classified as a

a)

homogeneous mixture

b)

heterogeneous mixture

c)

homogeneous compound

d)

heterogeneous compound

11.

Given the diagrams X, Y and Z: Which diagram or diagrams represent a mixture of elements A and B?

a)

X only

b)

Z only

c)

X and Y

d)

X and Z

12.

Identify this picture as an element, compound of mixture.

a)

Mixture

b)

Element

c)

Compound

13.

Identify this picture as an element, compound of mixture.

a)

Mixture

b)

Element

c)

Compound

14.

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

a)

Heterogeneous Mixture

b)

Homogeneous Mixture

15.
a)

Element

b)

Compound

c)

Homogeneous Mixture

d)

Heterogeneous Mixture

16.
a)

Element

b)

Compound

c)

Homogeneous Mixture

d)

Heterogeneous Mixture

17.

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

a)

A. element

b)

B. compound

c)

C. mixture

d)

D. solution

18.
Is salt (NaCI) a compound or a element
a)
Compound
b)
element
19.

What is CO2 and example of?

a)

element

b)

molecule

c)

compound

20.
Which of the following lists only elements?
a)
H2O + OH, MgCl2
b)
H2O, KF, Ne
c)
KCl, Ag, Au
d)
K, Cl, N
21.

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

a)

Element

b)

Molecule

c)

Mixture

22.
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
23.
Which of the following selections are the different types of mixtures?
a)
heterogenous, homogenous
b)
acid, base
c)
metal, nonmetal
d)
element, compound
24.
This type of mixture looks the same throughout. 
a)
Homogenous
b)
Heterogeneous
25.

Is this an element, compound or mixture?

(Each color circle is a different atom and touching circles are molecules.)

a)

Element

b)

Compound

c)

Mixture

26.

Is this an element, compound or mixture?

(Each color circle is a different atom and touching circles are molecules.)

a)

Element

b)

Compound

c)

Mixture

27.

Is this an element, compound or mixture?

(Each color circle is a different atom and touching circles are molecules.)

a)

Element

b)

Compound

c)

Mixture

28.

Is this an element, compound or mixture?

(Each color circle is a different atom and touching circles are molecules.)

a)

Element

b)

Compound

c)

Mixture

29.

Is this an element, compound or mixture?

(Each color circle is a different atom and touching circles are molecules.)

a)

Element

b)

Compound

c)

Mixture

30.

Is this an element, compound or mixture?

(Each color circle is a different atom and touching circles are molecules.)

a)

Element

b)

Compound

c)

Mixture

31.

Is this an element, compound or mixture?

(Each color circle is a different atom and touching circles are molecules.)

a)

Element

b)

Compound

c)

Mixture

32.

Is this an element, compound or mixture?

(Each color circle is a different atom and touching circles are molecules.)

a)

Element

b)

Compound

c)

Mixture

33.

Is this an element, compound or mixture?

(Each color circle is a different atom and touching circles are molecules.)

a)

Element

b)

Compound

c)

Mixture

34.
A substance that contains only one type of atom is a(n)
a)
compound
b)
element
c)
heterogeneous mixture
d)
homogeneous mixture
35.
a)
element
b)
compound
c)
mixture of elements
d)
mixture of compounds
36.
Water is a ___________. 
a)
element 
b)
mixture 
c)
compound 
37.
These must be separated chemically. 
a)
elements 
b)
compounds 
c)
mixtures 
d)
homogeneous mixtures 
38.

Copper - Cu

a)

Element

b)

Compound

c)

Homogeneous Mixture

d)

Heterogeneous Mixture

39.

Chalk - CaCO3

a)

Element

b)

Compound

c)

Homogeneous Mixture

d)

Heterogeneous Mixture

40.

Salt - NaCl

a)

Element

b)

Compound

c)

Homogeneous Mixture

d)

Heterogeneous Mixture

41.

Salt - NaCl

a)

Element

b)

Compound

c)

Homogeneous Mixture

d)

Heterogeneous Mixture

42.

Air

a)

Element

b)

Compound

c)

Homogeneous Mixture

d)

Heterogeneous Mixture

43.

Magnesium - Mg

a)

Element

b)

Compound

c)

Homogeneous Mixture

d)

Heterogeneous Mixture

44.

A pure substance can either be a(n) _____ or a(n) _____.

a)

element

b)

homogeneous mixture

c)

heterogeneous mixture

d)

compound

45.

Aluminum - Al

a)

Element

b)

Compound

c)

Homogeneous Mixture

d)

Heterogeneous Mixture

46.

Sugar (sucrose) ----C6H22O11

a)

Element

b)

Compound

c)

Homogeneous Mixture

d)

Heterogeneous Mixture

47.
A compound is made of ________ atoms. 
a)
big 
b)
similar 
c)
different 
48.

Compounds have different properties than the elements that they are made of.

a)

True

b)

False

49.

Which of these requires a chemical bond?

a)

Elements

b)

Compounds

c)

Mixtures

50.

Examples are diamonds (C) and Uranium (U)

a)

elements

b)

mixtures

c)

compounds

51.
Contains two or more atoms combined
a)
Elements
b)
Compounds
c)
Mixtures
52.
What cannot be broken down into other substances?
a)
Compound
b)
Mixture
c)
Solids
d)
Element
53.

All of the following are compounds EXCEPT:

a)

hydrogen

b)

sodium chloride

c)

water

d)

carbon dioxide

54.
These can only be separated by chemical means. 
a)
element 
b)
compound 
c)
mixture 
d)
stuff 
55.
The things in a mixture always retain their........
a)
smell properties 
b)
physical and chemical properties 
c)
shape 
d)
color 
56.
Elements can be broken down into simpler substances. 
a)
false 
b)
true 
c)
sometimes 
57.
This can be separated physically. 
a)
mixture 
b)
element 
c)
compound 
58.

A mixture that is not evenly blended is called?

a)

Element

b)

Compound

c)

Homogenous

d)

Heterogeneous

59.

A mixture that is uniformly mixed is called?

a)

Element

b)

Compound

c)

Homogeneous

d)

Heterogenous

60.

If matter has a chemical formula, it is automatically a:

a)

heterogenous mixture

b)

element

c)

homogenous mixture

d)

compound

61.

X is a substance made of only one type of atom. What type of matter is this?

a)

homogeneous mixture

b)

compound

c)

element

d)

heterogeneous mixture

62.

This is anything with mass that occupies space.

(a)  

63.

This is a substance that cannot be broken down further by chemical means.

(a)  

64.

This is two or more elements chemically combined in a fixed ratio.

(a)  

65.
What is a substance that is dissolved in another substance? 
a)
solution
b)
solute
c)
solvent
d)
compound
66.
What is a solvent?
a)
The substance that does the dissolving in a solution.
b)
The substance that is being dissolved in a solution.
c)
The mixing of different substances.
d)
The process in which neutral molecules lose or gain electrons
67.
Kool-Aid - Powder, sugar, and water
Identify the solvent 
a)
water
b)
powder
c)
sugar
d)
powder and sugar
68.
When Koolaid mix is light colored and tastes watery it is a _______ solution.
a)
saturated 
b)
diluted
69.
This is the part of the solution that does the dissolving. 
a)
solute
b)
solvent 
c)
salt water 
d)
First Continental Congress 
70.
The universal solvent is ______. 
a)
sodium 
b)
acid 
c)
water 
d)
wind 
71.
A solution is a ________ mixture. 
a)
heterogeneous 
b)
homogeneous 
c)
dumb 
d)
mixed 
72.

What is the term for a mixture where one substance is evenly distributed within another?

a)

Suspension

b)

Colloid

c)

Solution

d)

Emulsion

73.

 Steel 

a)

 Heterogeneous 

b)

 Homogeneous 

c)

 Compound 

d)

Element

74.

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

a)

heterogeneous

b)

homogeneous

c)

pure

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