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Chemistry 2026 AMCMS

Total questions: 53

Worksheet time: 1hrs 20mins

Name
Class
Date
1.
This picture represents: 
a)
Element
b)
Compound
c)
Mixture of Elements
d)
Mixture of Compounds
2.
A substance in which all the atoms are the same
a)
colloid
b)
homogeneous mixture
c)
solution
d)
element
3.
Which of the following is an element?
a)
Sugar
b)
Salt
c)
Water
d)
Oxygen
4.
This picture represents which of the following?
a)
element
b)
compound
c)
mixture
5.
A combination that can be separated by physical processes is a .....
a)
Pure Substance
b)
Glucose
c)
Element
d)
Mixture
6.
NaCl
a)
Element
b)
Compound
c)
Homogeneous Mixture
d)
Heterogeneous Mixture
7.

A ______________ is made up of different kinds of atoms chemically combined.

a)

element

b)

compound

c)

mixture

d)

molecule

8.

Which is a mixture of compounds?

a)
b)
c)
d)
9.
The air that fills this room would be classified as
a)
an element
b)
a compound
c)
a homogeneous mixture
d)
a pure substance
10.
Italian Salad Dressing is a . . .
a)
heterogeneous mixture
b)
homogeneous mixture
c)
Pure Substance
d)
Compound
11.
This picture represents: 
a)
Element
b)
Compound
c)
Mixture of Elements
d)
Mixture of Compounds
12.
How many Magnesium are in 10MgCl2?
a)
10
b)
5
c)
20
13.
How many Oxygen are in H2O?
a)
1
b)
2
c)
0
d)
4
14.
How many Hydrogen are in 4H2O?
a)
6
b)
8
c)
2
d)
4
15.
2H2 + O2 ----> 2H2O What is the product?
a)
------>
b)
2H2O
c)
2H2+ O2
16.
2H2 + O2 --------> 2H2O What  are the reactants?
a)
----->
b)
2H2O
c)
2H2 +O2
17.
Number of H in 3(NH₄)₂CrO₄
a)
4
b)
2
c)
8
d)
24
18.
How many atoms are there TOTAL in:
H2SO4
a)
6
b)
5
c)
7
d)
3
19.
How many elements are in C6H12O6?
a)
1
b)
2
c)
3
d)
4
20.
Number of N in (NH₄)₂CrO₄
a)
1
b)
2
c)
8
d)
16
21.

A capital letter or combination of a capital letter and a small letter that is used to represent an element is called a(n) ________

a)

element

b)

subscript

c)

coefficient

22.

How many atoms are present if there is no subscript following the element symbol?

a)

0

b)

2

c)

only 1

d)

1 million

23.

How many elements are in this chemical formula?

HCl

a)

1

b)

2

c)

3

d)

4

24.

What do we call the chemicals that result from a chemical reaction?

a)

reactants

b)

products

c)

subscripts

d)

coefficients

25.

How many oxygen atoms are in the products for the chemical reaction below?
4Fe + 3O2 → 2Fe2O34Fe\ +\ 3O_{2\ }\rightarrow\ 2Fe_2O_3  

a)

2

b)

3

c)

5

d)

6

26.

The Law of Conservation of Mass says that matter can neither be __________ or __________.

a)

created; destroyed

b)

recycled; renewed

c)

subtracted; added

d)

joined; separated

27.

According to the Law of Conservation of Mass, what happens to the wood and oxygen when it is burned?

a)

The wood disappears.

b)

It stays the same chemically.

c)

The atoms in the wood and oxygen rearrange and form smoke and ash.

d)

Nothing.

28.
Substances present at the start of a chemical reaction
a)
subscripts
b)
coefficients
c)
reactants
d)
products
29.
What does the principle of conservation of mass mean?
a)
The total mass of the reactants is more than the products
b)
Matter is not created or destroyed
c)
The total mass of the reactants is less than the products
30.
Is this equation balanced or unbalanced? 
H2 + O2 --> H2O
a)
balanced
b)
unbalanced
31.
Which of the following is a sign that a chemical reaction has occurred?
a)
change in shape
b)
melting
c)
formation of a gas
d)
dissolving
32.
Is melting butter for popcorn a chemical or physical change?
a)
chemical
b)
physical
33.
Iron is a good conductor, malleable and magnetic. What type of element is Iron? 
a)
Metal
b)
Nonmetal
c)
Metalloid
d)
Pretty
34.
The word “luster” refers to which property of matter?
a)
The ability to conduct electrical or thermal energy
b)
Capable of being drawn out into thin wires
c)
The way a surface appears when it reflects light
d)
Suitable for being shaped by beating or rolling
35.
Where are metalloids located on the periodic table?
a)
to the right of nonmetals
b)
along the zig-zag line
c)
to the left of the zig-zag line
d)
to the right of the zig-zag line
36.
How do metals differ from nonmetals?
a)
metals are shiny, nonmetals are dull
b)
metals are good insulators, nonmetals are good conductors
c)
metals are powdery
d)
nonmetals are shiny
37.
Brittleness is _________
a)
the capability of being broken.
b)
the capability of being bent.
c)
the capability of being stretched.
d)
the capability of being molded.
38.
Which is a way that a piece of paper can go through a chemical change?
a)
fold the paper in half
b)
soak the paper in water
c)
burn the paper with fire
d)
cut the paper with scissors
39.
Which of these is an example of a new substance being formed?
a)
a nail rusting
b)
a wall being painted
c)
water changing to steam
d)
paper being folded
40.
Which example best describes a physical change?
a)
iron rusting
b)
charcoal burning
c)
an ice cube melting
d)
a marshmallow burning
41.
Glass bottle that is shattered
a)
Chemical Change
b)
Physical Change
42.
Baking soda and vinegar combine to make carbon dioxide
a)
Chemical Change
b)
Physical Change
43.

Which of the following are examples of a Chemical Change?

a)

Iron Rusting

b)

Gas Burning

c)

Breaking a glass

d)

Boiling water

e)

Burning Wood

44.
Sugar dissolves in water
a)
Chemical Change
b)
Physical Change
45.
Grass growing in a lawn
a)
Chemical Change
b)
Physical Change
46.

A physical change _____________ the identity of the substance.

a)

changes

b)

maintains

47.

A chemical change _____________ the identity of the substance.

a)

changes

b)

maintains

48.

What is density?

a)

Density is a quantity that conveys how much matter is concentrated in a certain amount of space (volume).

b)

Density Anything that has mass and takes up volume.

c)

Density is the space an object takes up.

d)

None of the above

49.
Which liquid is the least dense?
a)
oil
b)
water
c)
syrup 
d)
plastic bottle
50.
Why do some substances float on water?
a)
they are warmer than water
b)
they are cooler than water
c)
they are more dense than water
d)
they are less dense than water
51.
If you poured 3 liquids that do not mix how could you tell which one is the most dense?
a)
The liquid on top
b)
The liquid in the middle
c)
The liquid at the bottom
52.
Look at this image.  Which object has the LOWEST density in water? How? 
a)
The Ping Pong Ball because it floats to the top 
b)
The bolt because it has sunk to the bottom
c)
The soda cap because it is not just full of air like the Ping Pong ball
53.
Put the liquids in order from most dense to least dense?
a)
4, 3, 2, 1
b)
1, 2, 3, 4
c)
3, 4, 2, 1, 
d)
4, 3, 1, 2

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