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WorksheetsChemistry Review
Total questions: 21
Worksheet time: 41mins
Name
Class
Date
1.
What is an element?
a)
A pure substance at its simplest form
b)
Random atoms arranged
2.
What is an atom?
a)
Smallest thing measurable
b)
Basic unit of a chemical element
c)
A bomb used in WW2
3.
How do atoms bond to form molecules?
a)
The outer electrons combine
b)
The valence electrons bond together
c)
All the above
4.
All matter is made of what?
a)
Energy
b)
Atoms
c)
Electrons
d)
Compounds
5.
Why does mass, before and after the reaction, stay the same?
a)
Laws of Thermodynamics
b)
Law of Life
c)
Law of Conservation Mass
d)
Law of Mass Action
6.
What is a polymer?
a)
Many monomers together
b)
Many polymers together
c)
Lots of stuff put on balls and sticks
7.
What is the formula for sugar?
a)
H22C12O11
b)
O11H22C12
c)
C12H22O11
8.
What takes place in a chemical reaction?
a)
The atoms rearranged
b)
They stay the same
c)
Lose atoms or gain new ones
9.
What is some evidence for a chemical reaction?
a)
Fizzing
b)
Color change
c)
Paper being cut in half
d)
Both A and B
10.
What is an example of physical change?
a)
Hydrogen and oxygen combine
b)
Fireworks exploding
c)
Money being sliced in half
11.
How many phases of matter are there, and what are they?
a)
4; Fire, Water, Earth, and Aether
b)
3; Gas, Liquid, and Water
c)
5; Plastic, Wood, Glass, Wool, and Food
12.
Where is Argon located in the periodic table?
a)
Period 18 Group 3
b)
Period 3 Group 18
13.
What is the name for group one?
a)
Alkali Metals
b)
Alkali Earth Metals
c)
Noble Gases
14.
The Noble Gases are in which group number?
a)
Group 2
b)
Group 17
c)
Group 18
15.
What are the elements?
CaCO₃
CaCO₃
a)
Oxygen, Argon, Money
b)
Sulfur, Carbon, Magnesium
c)
Calcium, Carbon, Oxyen
16.
True or False: A molecule is a compound
a)
True
b)
False
17.
Is hammering wood together to build a house a chemical or physical change?
a)
chemical
b)
physical
18.
What is the red arrow in this image pointing to?
a)
A chemical formula
b)
A chemical equation
c)
The chemical symbol for Hydrogen
19.
NACL is the chemical formula for______.
a)
Salt
b)
Water
c)
Vinegar
20.
H2O is the chemical formula for ______.
a)
Salt
b)
Water
c)
Vinegar
21.
Subscripts are the _________ numbers in a chemical formula.
a)
Smaller
b)
Larger
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