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G7 Science Chemistry Review

Total questions: 100

Worksheet time: 50mins

Name
Class
Date
1.
The smallest particle of any element that still has the properties of that element is called
a)
an atom
b)
a compound
c)
a solution
d)
a mixture
2.
What does the diagram show?
a)
A mixture of two elements
b)
A pure compound
c)
A mixture of two compounds
d)
A mixture of a compound & element
3.
What does the diagram show?
a)
A mixture of two elements
b)
A pure compound
c)
A mixture of two compounds
d)
A mixture of a compound & element
4.
What does the diagram show?
a)
A mixture of two elements
b)
A pure compound
c)
A mixture of two compounds
d)
A mixture of a compound & element
5.
What does the diagram show?
a)
A mixture of two elements
b)
A pure compound
c)
A mixture of two compounds
d)
A mixture of a compound & element
6.
Which description below is a true statement about the diagram?
a)
The diagram can be classified as an element and a molecule
b)
The diagram can be classified as a compound
c)
The diagram can be classified as a mixture of two compounds
d)
The diagram can be classified as a mixture of two elements
7.
Which statement below is TRUE about compounds?
a)
The properties of compounds are totally different than the properties of the elements that form them
b)
All compounds are listed on the Periodic Table of Elements
c)
A compound is a pure substance that is made from one type of atom
d)
The properties of compounds are the same as the properties of the elements that form them
8.
A pure substance that is made from one type of atom is a(n) ______________ .
a)
Mixture
b)
Atom
c)
Element
d)
Compound
9.
Classify Sulfuric Acid (H2SO4) as an element or compound.
a)
Element
b)
Compound
10.
Classify Sulfur (S) as an element or compound.
a)
Element
b)
Compound
11.
Classify Phosphorus (P) as an element or compound.
a)
Element
b)
Compound
12.
Classify Sodium Chloride (NaCl) as an element or compound.
a)
Element
b)
Compound
13.
How many TOTAL atoms make up the molecule 8K2SO4?
a)
8
b)
56
c)
7
d)
15
14.
TRUE OR FALSE:
There are millions of elements.
a)
True
b)
False
15.
TRUE OR FALSE:
There are millions of compounds.
a)
True
b)
False
16.
TRUE OR FALSE:
There are about 118 elements.
a)
True
b)
False
17.
TRUE OR FALSE:
There are about 118 compounds.
a)
True
b)
False
18.
TRUE OR FALSE:
Water is an element.
a)
True
b)
False
19.
TRUE OR FALSE:
Water is a compound.
a)
True
b)
False
20.

Look closely at part of the periodic table shown. Which of the following pairs of elements have properties that are the least similar?

a)

N and P

b)

Ge and Br

c)

He and Xe

d)

Cl and I

21.

Steven noticed that one of the ingredients contained in his fruit-flavored snack was “artificial flavors.” One chemical used for that purpose is isopropyl acetate (CH3COOC3H7). How many carbon atoms are present in one molecule of isopropyl acetate, CH3COOC3H7?

a)

1

b)

2

c)

5

d)

6

22.

Ethane, one of the smallest hydrocarbons, is used in the production of many other chemicals. How many hydrogen (H) atoms are shown in the model of ethane?

a)

2

b)

3

c)

6

d)

8

23.

Francine’s mother made a fruit salad for breakfast. While Francine was eating her fruit salad, she exclaimed to her mother, ”I’m enjoying this mixture!”. Why did Francine refer to the fruit salad as a mixture?

a)

The fruit salad contains various ingredients mixed in fixed amounts.

b)

The fruit salad contains various ingredients that each retain their original chemical properties.

c)

The fruit salad contains components whose original chemical properties have been changed after mixing.

d)

The fruit salad contains various ingredients that can be separated only by using chemical means.

24.

The illustration below shows the process of two different substances being combined. Which process does the illustration show?

a)

two pure substances physically combined to form a mixture

b)

two pure substances chemically combined to form a different pure substance

c)

a mixture separated into the components that were originally combined

d)

a solution formed by dissolving a solid in a liquid

25.

What is an element made of?

a)

One kind of atom

b)

Two or more kinds of atoms

c)

A mixture of elements

d)

None of the above

26.

Which of the following is an example of a compound?

a)

Gold

b)

Oxygen

c)

Carbon

d)

Salt

27.

How are mixtures formed?

a)

Chemically combined

b)

Physically mixed

c)

Both chemically and physically combined

d)

None of the above

28.

Which of the following is a type of mixture?

a)

Element

b)

Compound

c)

Solution

d)

All of the above

29.

  1. What is an atom?

a)

  1. A type of mixture

b)

  1. The smallest unit of a compound

c)

  1. The smallest unit of an element

d)

  1. A type of solution

30.
all matter is made of what 
a)
energy 
b)
atoms 
c)
electrons 
d)
compounds 
31.
How many Hydrogen are in 4H2O?
a)
6
b)
8
c)
2
d)
4
32.
How many elements are in C6H12O6?
a)
1
b)
2
c)
3
d)
4
33.
How many atoms of Hydrogen are in this compound
a)
1
b)
2
c)
3
d)
4
34.
A pure substance that cannot be broken down into simpler substances.
a)
element
b)
compound
c)
molecule
d)
carbon dioxide
35.
Which of the following is a pure substance? 
a)
Water
b)
Salad
c)
Chocolate milk
d)
All of them 
36.
A pure substance...
a)
Looks the same from every part you look 
b)
Looks different from every part you look
37.
Based on its composition, matter can be classified in...
a)
Pur substance & Mixture
b)
Solid, liquid, gas
38.
Marifer adds fruit to her yogurt. This is an example of a: 
a)
Pure substance
b)
Mixture
39.
Miss Pamela is thirsty and she prepares a lemonade. This is an example of a:  
a)
Pure substance
b)
Mixture
40.
A pure substance CAN'T BE separated physically. 
a)
True
b)
False
41.
Which of the following is a pure substance? 
a)
Water
b)
Sugar
c)
Wood
d)
ALL of them
42.
Which of the following lists only elements?
a)
H2O + OH, MgCl2
b)
H2O, KF, Ne
c)
KCl, Ag, Au
d)
K, Cl, N
43.

H2

a)

Element

b)

Compound

c)

Mixture

44.

NaCl

a)

Element

b)

Compound

c)

Mixture

45.
a)

Element

b)

Compound

c)

Mixture

46.
a)

Element

b)

Compound

c)

Mixture

47.
a)
element
b)
compound
c)
mixture of elements
d)
mixture of compounds
48.
a)
element
b)
compound
c)
mixture of elements
d)
mixture of compounds
49.
a)
element
b)
compound
c)
mixture of elements and compounds
d)
mixture of compounds
50.
a)
element
b)
compound
c)
mixture of elements
d)
mixture of compounds and elements
51.
a)
element
b)
compound
c)
mixture of elements
d)
mixture of compounds
52.
a)
element
b)
compound
c)
mixture of elements and compounds
d)
mixture of compounds
53.
a)
element
b)
compound
c)
mixture of elements and compounds
d)
mixture of compounds
54.
a)
element
b)
compound
c)
mixture of elements and compounds
d)
mixture of compounds
55.
a)
element
b)
compound
c)
mixture of elements
d)
mixture of compounds
56.

What is sugar, C12H22O11?

a)

element

b)

compound

c)

mixture

57.
Which one can be found on the periodic table?
a)
Compound 
b)
Element
58.
This picture represents which of the following?
a)
element
b)
compound
c)
mixture
59.
The air is a _________. 
a)
element 
b)
mixture 
c)
compound 
d)
energy 
60.
Elements can be broken down into simpler substances. 
a)
false 
b)
true 
c)
sometimes 
61.
Which of the following is not a compound?
a)
HCl
b)
Cl
c)
NaCl
d)
CO2
62.

diagram "a" is an example of a(n)

a)

element

b)

compound

c)

mixture

63.

diagram "b" is an example of a(n)

a)

element

b)

compound

c)

mixture

64.

diagram "c" is an example of a(n)

a)

element

b)

compound

c)

mixture

65.

diagram "d" is an example of a(n)

a)

element

b)

compound

c)

mixture

66.

What has a formula?

a)

Elements only

b)

Compounds only

c)

All Pure substances

d)

Mixtures

67.
The smallest particle of any element that still has the properties of that element is called
a)
an atom
b)
a compound
c)
a solution
d)
a mixture
68.
What does the diagram show?
a)
A mixture of two elements
b)
A pure compound
c)
A mixture of two compounds
d)
A mixture of a compound & element
69.
What does the diagram show?
a)
A mixture of two elements
b)
A pure compound
c)
A mixture of two compounds
d)
A mixture of a compound & element
70.
What does the diagram show?
a)
A mixture of two elements
b)
A pure compound
c)
A mixture of two compounds
d)
A mixture of a compound & element
71.
What does the diagram show?
a)
A mixture of two elements
b)
A pure compound
c)
A mixture of two compounds
d)
A mixture of a compound & element
72.
Which description below is a true statement about the diagram?
a)
The diagram can be classified as an element and a molecule
b)
The diagram can be classified as a compound
c)
The diagram can be classified as a mixture of two compounds
d)
The diagram can be classified as a mixture of two elements
73.
A pure substance that is made from one type of atom is a(n) ______________ .
a)
Mixture
b)
Atom
c)
Element
d)
Compound
74.
Contains only one kind of atom.
a)
Element
b)
Compund
c)
Mixture
75.
Contains two or more atoms combined
a)
Elements
b)
Compounds
c)
Mixtures
76.
Examples are milk and gasoline.
a)
elements
b)
mixtures
c)
compounds
77.

What does this illustrate

a)

Elements

b)

Compunds

c)

Mixture of Elements and Compunds

d)

Mixture of Compounds

78.

This picture represents which of the following?

a)

A single element

b)

Mixture of molecules

c)

mixture of atoms

d)

mixture of compounds

79.

Elements are arranged in decreasing order of atomic numbers in the Periodic Table.

a)

T

b)

F

80.

Elements in Group II have exactly the same chemical properties.

a)

T

b)

F

81.

Vertical columns ae called groups in the Periodic Table.

a)

T

b)

F

82.

Group VII elements are known as noble gases.

a)

T

b)

F

83.

Refer to the given Periodic Table, Al belongs to which group in the Periodic Table.?

a)

Group I

b)

Group II

c)

Group III

d)

Group 0

84.

Refer to the given Periodic Table, Cl belongs to

a)

Group I

b)

Group IV

c)

Group VII

d)

Group 0

85.

Which of the following statements about Li and Na is correct?

a)

Both belong to Group II of the Periodic Table.

b)

Both have the same chemical properties.

c)

Both are called alkali metals.

d)

Both are non-metals.

86.

Refer to the given Periodic Table, what is the position of Si in the Periodic Table?

a)

Group III, Period 4

b)

Group IV, Period 3

c)

Group III, Period 2

d)

Group IV, Period 4

87.

The element shown belongs to Group …

a)

I

b)

II

c)

VII

d)

0

88.

Which of the following pairs of elements belong to the same group in the Periodic Table?

a)

C and Si

b)

Na and P

c)

K and Ca

d)

H and He

89.
How did Mendeleev arrange the elements?
a)
alphabetical 
b)
density
c)
melting point
d)
atomic mass
90.
The horizontal row on the periodic table is called a
a)
group
b)
family
c)
period
d)
atomic number
91.
Dimitri found that there was a pattern of properties that repeated every ____ elements.
a)
2
b)
4
c)
5
d)
7
92.
A vertical column is called...
a)
group
b)
tower
c)
period
d)
crew
93.
Which of the following is the most metallic element in period 3?
a)
Boron (B)
b)
Sodium (Na)
c)
Argon (Ar)
d)
Silicon (Si)
94.
Which of these element is the least metallic?
a)
Potassium (K)
b)
Carbon (C)
c)
Sulfur (S)
d)
Neon (Ne)
95.
The number at the top of each square on the periodic table is the ...
a)
atomic number
b)
atomic mass
c)
Chemical Symbol
d)
Element Name
96.
What is the chemical symbol for Lithium?
a)
H
b)
He
c)
Li
d)
N
97.
A rule that states that repeating chemical and physical properties of elements change periodically with the atomic number of the elements is the _________.
a)
periodic law
b)
alkaline-earth metals
c)
actinide
d)
group rule
98.
Diamonds are a pure form of what element?
a)
Carbon
b)
Oxygen
c)
Silicon
d)
Silver
99.
Most of the elements on the periodic table are classified as _____.
a)
Metals
b)
Nonmetals
c)
Metalloids
d)
Periods
100.
This class of elements are sometimes called "semiconductors."
a)
Metals
b)
Nonmetals
c)
Metalloids
d)
Groups

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