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Chemistry Counting Atoms and Properties

Total questions: 47

Worksheet time: 41mins

Name
Class
Date
1.

Which of the following is a chemical property

a)

pH

b)

Reactivity

c)

Toxicity

d)

All of the above

2.
Is wood burning a physical or chemical change?
a)
Physical 
b)
Chemical
3.
Is Gatorade powder dissolving in water physical or chemical change?
a)
Physical 
b)
Chemical
4.

The ability to dissolve in a liquid

a)

Is a physical property

b)

Is a chemical property

5.
Physical Property
a)
A property that can be measured or observed without changing what it is
b)
A property of how matter behaves when it is brought into contact with other matter.
c)
A very small piece of matter
d)
Substances that make up everything
6.

Texture, color, states of matter, flexibility, freezing & melting points

a)

Chemical Properties

b)

Physical Properties

c)

States of Mass

d)

Scientific matterology

7.

Breaking a window or crumpling a piece of paper are examples of a....

a)

Physical Change

b)

Chemical Change

8.

A state of matter in which the substance has a definite shape and definite volume.

a)

Gas

b)

Element

c)

Solid

d)

Liquid

9.

Select ALL of the characteristics of a physical change

a)

changes in appearance only

b)

a new substance is not created

c)

changes in the ph level

d)

burning and fire

e)

chemical bonds are not created or broken

10.

This is an example of a _________ change.

a)

physical

b)

chemical

11.

This is an example of a ________ change.

a)

physical

b)

chemical

12.

The different types of atom are called

a)

Elements

b)

Molecules

c)

Compounds

13.

Two or more atoms bonded together are called

a)

An element

b)

A molecule

c)

A big ol' bunch

d)

A reaction

14.
How many elements are in C6H12O6?
a)
1
b)
2
c)
3
d)
4
15.

How many Sodium (Na) atoms are in 6NaCl?

a)

1

b)

12

c)

6

16.
How many atoms of Hydrogen are in this compound
a)
1
b)
2
c)
3
d)
4
17.

How many molecules are there in 4H2C3O4N5

a)

2

b)

3

c)

4

d)

5

18.

What is a coefficient?

a)

The small number on the right of the chemical symbol which tells you how many atoms there are.

b)

The large number to the left of a formula which tells you how many molecules there are.

19.
A subscript is the small number below a(n) ________ that tells the number of _______ of that element.
a)
element symbol; atoms
b)
atom; element symbol
c)
subscript; protons
d)
compound; elements
20.

A physical reaction is a chemical reaction which

a)

changes the physical properties of the elements.

b)

changes the chemical properties of an element.

c)

separates atoms in a mixture.

d)

combines atoms in a mixture.

21.

Chemical properties are

a)

an element’s ability to react with other elements.

b)

an element's ability to change into a gas.

c)

an elements attraction to water.

d)

any property which can be observed or measured.

22.
Is the following equation balanced?...
Al + O2 --> 2Al2O3
a)
Yes!
b)
No!
23.

A substance's ability to dissolve is called

a)

solubility.

b)

boiling point.

c)

freezing point.

d)

density.

24.
How many Hydrogen are in 4H2O?
a)
6
b)
8
c)
2
d)
4
25.

Which of the following is an example of something dissolving?

a)

Mixing sugar, lemon juice, and water for lemonade.

b)

Mixing sand and gravel for the substrate of a fish tank.

c)

Mixing oil and vinegar for salad dressing.

d)

Mixing cereals and nuts for a snack mix.

26.

Materials boil at different temperatures, the specific temperature a material has to reach in order to boil is called the materials

a)

boiling point.

b)

freezing point.

c)

melting point.

d)

solidification point.

27.

True or False - Water is considered the universal solvent.

a)

True

b)

False

28.

Which of the following is a compound containing more than one element?

a)

NaCl

b)

Be

c)

S

d)

Ne

29.
Balance this equation.
_Mg + _Cl2 --> _MgCl2
a)
1, 2,1
b)
already balanced
c)
2,1,1
d)
1,1,2
30.

What is the total number of atoms in H2O2 ?

a)

2

b)

4

c)

1

d)

8

31.

In this chemical equation, the elements in red are the_______.

a)

Products

b)

Reactants

c)

Subscripts

d)

Coefficients

32.
What occurs when liquids become solids?
a)
Melting
b)
Vaporization
c)
Freezing
d)
Deposition
33.
True or False
In a chemical reaction, no new atoms are created, and no atoms are destroyed. 
a)
true
b)
false
34.

What is the coefficient in 4H2O?

a)

6

b)

8

c)

2

d)

4

35.

What does the Law of Conservation of Mass state?

a)

Matter cannot be created or destroyed in a chemical reaction.

b)

Matter can only be lost in a chemical reaction.

c)

Matter can only be gained in a chemical reaction.

d)

Matter can be gained and lost in a chemical reaction.

36.

Which of the following would be the solute?

a)

Water in a sugar water solution

b)

Salt in a salt water solution

c)

Both the salt and water in a salt water solution

37.
Which statement is not a description of a chemical reaction?
a)
A solid is dropped into a beaker of liquid and a gas is released.
b)
Two liquids are mixed in a beaker and a solid forms at the bottom of the beaker.
c)
A solid is dropped into a beaker of liquid and an explosion occurs.
d)
A liquid is heated in the sun and half of it evaporates.
38.
Which of the following is NOT a sign of a chemical reaction? 
a)
Color changes
b)
Cutting into fourths
c)
Light is produced
d)
Gas is formed
39.

What is the picture displayed?

a)

Carbon Dioxide

b)

Water

c)

Gasoline

d)

Liquid Nitrogen

40.
In this compound structure of alcohol, how many Hydrogen atoms are there?
a)
2
b)
4
c)
6
d)
8
41.
Is this equation balanced?
a)
yes
b)
no
c)
Not enough information
42.
What do we call a chemical substance made up of 2 or more different types atoms bonded together?
a)
formula
b)
atom
c)
subscript
d)
compound
43.
When __________ form, the elements lose there individual chemical properties and take on new properties.
a)
compounds
b)
atoms
c)
subscript
d)
formula
44.
Which of these items is made up of one or more molecules?
a)
Gold
b)
Hydrogen
c)
Salt 
d)
Neon 
45.
Which of the following shows the correct way to balance the chemical equation?
Fe + O2 -> Fe2O3
a)
4Fe + 3O2 -> 2Fe2O3
b)
2 Fe + 3O2 -> Fe2O6
c)
4 Fe + O6 -> 2Fe2O3
d)
None of the options are correctly balanced.
46.
What is the total number of atoms present in 5Na3PO4
a)
5
b)
40
c)
55
d)
8
47.
Balance this equation-
__P4 + __O2 --> __P2O3
a)
it is already balanced
b)
2, 1, 3
c)
1, 2, 3
d)
1, 3, 2

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