Wayground logo

Free Printable Worksheets

Font size

S
M
L
XL
Worksheets

Atoms, Periodic Table, Chemical Equations

Total questions: 88

Worksheet time: 1hrs 5mins

Name
Class
Date
1.
The substances listed on the right side of a chemical equation are the
a)
Yields
b)
Reactants
c)
Products
d)
Precipitates
2.
The substances listed on the left side of a chemical equation are the
a)
Products
b)
Coefficients
c)
Precipitates
d)
Reactants
3.
In chemical reactions, what does the principle of conservation of mass mean?
a)
Matter is not created or destroyed.
b)
The total mass of the reactants is greater than the total mass of the products.
c)
The total mass of the reactants is less than the total mass of the products.
d)
Matter is not changed.
4.
A molecule is smaller than an atom.
a)
True
b)
False
5.
How many Oxygen (O) atoms are in 2C2HO8Cl2
a)
2
b)
16
c)
8
d)
5
6.
A molecule is________
a)
a glob of gelatinous goo
b)
smaller than an atom
c)
filled with raisons
d)
more than one atom bonded together
7.
Which is the Law of Conservation of Matter?
a)
matter cannot be created or destroyed, it only changes form
b)
matter can be created but it cannot be destroyed, it never changes form
c)
matter can be destroyed but it cannot be created, it usually just changes form
d)
matter is an unproven theory created by Hans Geiger
8.
How many elements are in C6H12O6?
a)
1
b)
2
c)
3
d)
4
9.
Which one is a compound?
a)
Co
b)
Br
c)
Fe
d)
CO
10.
Which one is an element?
a)
Co
b)
CO
c)
CO2
d)
CO3-2
11.

Identify the Reactants in this equation.

a)

A

b)

B

12.

What state of matter is this substance?

a)

solid

b)

liquid

c)

gas

d)

aqueous

13.

Identify the number in blue.

a)

Product

b)

Reactant

c)

Coefficient

d)

Subscript

14.

What does the symbol inside the circle mean?

a)

"yields, or produces"

b)

"dissolved in water"

c)

"forms a precipitate"

d)

"released as a gas"

15.

How many molecules of KNO3 are shown?

a)

1

b)

2

c)

3

d)

4

16.
When dry ice (solid carbon dioxide) sublimes it goes directly from a solid to a gas. What type of change is occurring? 
a)
Chemical change
b)
Physical change
c)
None of the above 
17.
Why must we balance chemical equations? 
a)
Our teacher said so
b)
to abide by the law of conservation of energy
c)
to abide by the law of conservation of mass
18.
Which of the following is true? 
a)
Na is a gas
b)
Cl combusts when put in water
c)
NaCl is very different than Na and Cl
d)
Cl is a metal
19.
Which of the following can be broken apart in a chemical reaction? 
a)
Noble gases
b)
Molecules and compounds
c)
only molecules
d)
only compounds 
20.

When balancing this equation, Fe + Cl2 → FeCl3, the correct coefficient for Cl2?

a)

1

b)

2

c)

3

d)

4

21.

The products of a reaction have the same ________as the reactants.

a)

molecule

b)

atoms

c)

subscripts

d)

coefficients

22.

Chemical equations

a)

give directions for naming compounds

b)

describe only biological changes

c)

describe chemical reactions

d)

show how to write formulas

23.
Name the part in red:

H2 + O2 -> H2O
a)
Coefficient
b)
Product
c)
Yield
d)
Subscript
24.

The positively charged particle in an atom.

a)

Proton

b)

Neutron

c)

Electron

d)

Nucleus

25.

The unit used to express the mass of the particles in an atom.

a)

Proton

b)

AMU

c)

Neutron

d)

Electron

26.

The smallest part of any element. Made up of protons, neutrons and electrons.

a)

Atom

b)

AMU

c)

Ion

d)

Isotope

27.

Identifies the number of protons in an atoms nucleus.

a)

Electron Cloud

b)

Atomic Theory

c)

Atomic Number

d)

Mass Number

28.

The negatively charged particles in an atom

a)

Proton

b)

Electron

c)

Neutron

d)

Electron Cloud

29.

The total number of protons and neutrons in the nucleus of an atom

a)

Atomic Number

b)

Mass Number

c)

Atomic Theory

d)

Electron Cloud

30.

The particles in the nucleus of an atom that do not have a charge (neutral)

a)

Proton

b)

Electron

c)

Neutron

d)

Ion

31.

The small, dense, positively charged center of an atom

a)

Neutron

b)

Proton

c)

Nucleus

d)

Electron

32.

The smallest particle an element can be divided into is the

a)

electron

b)

neutron

c)

isotope

d)

atom

33.

Which two particles are found in an atom’s nucleus?

a)

proton and electron

b)

proton and neutron

c)

electron and neutron

d)

mitochondria and cytoplasm

34.

What two particles account for almost all of the mass of an atom?

a)

neutron and proton

b)

neutron and electron

c)

electron and proton

d)

iron and protein

35.
Mass number is
a)
protons + electrons.
b)
protons + neutrons.
c)
electrons + neutrons.
36.

True or False:

A chemical symbol is a code used to represent each element.

a)

True

b)

False

37.
A particle that orbits around the nucleus is a(n)...
a)
Proton
b)
Neutron
c)
Electron
d)
Quark
38.
The atomic number of an atom is the number of 
a)
protons in its electron cloud
b)
protons in its nucleus
c)
neutrons in its nucleus
d)
electrons and neutrons in the nucleus
39.
Electrons have this type of charge
a)
positive
b)
negative
c)
neutral - no charge
40.
Which letter represents an electron?
a)
A
b)
B
c)
C
d)
D
41.
Which letter represents a neutron?
a)
A
b)
B
c)
C
d)
D
42.
How many electrons does potassium K contain? (click to see image)
a)
19
b)
39
c)
20
d)
40
43.

How many neutrons does a Hydrogen atom have?

a)

1

b)

2

c)

3

d)

0

44.

How many neutrons does an Oxygen atom have?

a)

8

b)

16

c)

24

d)

7.999

45.
How many protons are in Beryllium?
a)
4
b)
9
c)
5
d)
2
46.
How many atoms are there TOTAL in:
H2SO4
a)
6
b)
5
c)
7
d)
3
47.

What charge do neutrons have?

a)

positive

b)

negative

c)

neutral

48.

How many protons does an atom of Nitrogen have?

a)

7

b)

14

c)

21

49.

How many electrons does a neutral atom of Nitrogen have?

a)

7

b)

14

c)

21

50.

How many neutrons does an atom of Nitrogen have?

a)

7

b)

14

c)

21

51.

The atomic number is always the number of

a)

protons

b)

neutrons

c)

electrons

52.

To find the number of neutrons....

a)

add the number of electrons and number of protons

b)

subtract the atomic number from the atomic mass

c)

subtract the number of protons from the number of electrons

53.

What is an element?

a)

A pure substance that cannot be broken down.

b)

Two atoms bonded together.

c)

Two or more different types of atoms bonded together.

d)

An molecule with an unequal distribution of charge.

54.

What is matter?

a)

Matter has mass and takes up space.

b)

Matter is charged atoms.

c)

Matter has a charge and a mass.

d)

Matter is polar molecules.

55.
Which of these items is made up of one or more molecules?
a)
Gold
b)
Hydrogen
c)
Salt 
d)
Neon 
56.

What is a substance made of two or more elements that are chemically combined called?

a)

A. element

b)

B. compound

c)

C. mixture

d)

D. solution

57.

Is salt (NaCI) a compound or an element?

a)

Compound

b)

element

58.

Two or more physically combined substances form

a)

a compound.

b)

an acid.

c)

an element.

d)

a mixture.

59.

What is an example of a mixture?

a)

Table salt

b)

Water

c)

Oxygen

d)

Air

60.

A substance that contains only one type of atom is a(n)

a)

compound

b)

element

c)

heterogeneous mixture

d)

homogeneous mixture

61.
Carbon Dioxide is a ______ 
a)
compound 
b)
element 
c)
mixtures 
d)
Battle of Bunker Hill 
62.
This picture represents which of the following?
a)
element
b)
compound
c)
mixture of elements
d)
mixture of compounds
63.

The smallest unit of a compound is

a)

an element.

b)

a molecule.

c)

an atom.

d)

a mixture.

64.

The smallest unit of an element is

a)

a compound.

b)

a molecule.

c)

an atom.

d)

a mixture.

65.

What determines the order of elements on today's periodic table?

a)

increasing atomic mass

b)

decreasing atomic mass

c)

increasing atomic number

d)

decreasing atomic number

66.

Which is NOT a property of metals?

a)

brittleness

b)

conductivity

c)

ductility

d)

luster

67.

What are two properties that make a metal a good choice to use as wire in electronics?

a)

conductivity, malleability

b)

ductility, conductivity

c)

luster, malleability

d)

malleability, high density

68.

Where are most metals on the periodic table?

a)

on the left side only

b)

on the right side only

c)

in the middle only

d)

on the left side and in the middle

69.

Using the periodic table, which element is a metalloid?

a)

carbon

b)

silicon

c)

oxygen

d)

aluminum

70.

Iodine is a nonmetal. What is one property of iodine?

a)

conductivity

b)

dull appearance

c)

malleability

d)

ductility

71.

What is one similarity among elements in a group?

a)

atomic mass

b)

atomic weight

c)

chemical properties

d)

practical uses

72.

Where are most nonmetals located on the periodic table?

a)

in the bottom row

b)

on the left side and in the middle

c)

on the right side

d)

in the top row

73.

Which group of elements can act as semiconductors?

a)

halogens

b)

metalloids

c)

metals

d)

noble gases

74.

Which of the following will have similar properties?

a)

O, S, Se

b)

O, F, Ne

c)

N, Ne, Na

d)

H, K, P

75.
Each column in the periodic table is called a _________ .
a)
period
b)
group
c)
cluster
d)
unit
76.
Periods on the periodic table are __________.
a)
Horizontal Rows
b)
Vertical Columns
77.
Groups on the periodic table are __________.
a)
Horizontal Rows
b)
Vertical Columns
78.

How many periods are on the periodic table?

a)

5

b)

6

c)

7

d)

8

79.
Which is a halogen?
a)
Helium
b)
Chlorine
c)
Oxygen
d)
Neptune
80.

The blue elements (left side) are called 

a)
metals
b)
nonmetals
c)
metalloids
d)
noble gases
81.

Match the following

a)

Elements

1.

Contain only one type of atom

b)

Molecules

2.

at least 2 atoms combined together

c)

Compounds

3.

At least 2 DIFFERENT atoms combined together

d)

Mixture

4.

2 or more substances that are NOT chemically combined

82.

Match the following

a)

Located in the nucleus; have a positive charge; and a mass of 1 amu

1.

Protons

b)

Located outside of the nucleus; have a negative charge; and a mass of zero

2.

electrons

c)

located in the nucleus; have no charge; and mass of 1 amu

3.

neutrons

83.

What environmental element assists rusting?

a)

nitrogen

b)

oxygen

c)

carbon

d)

hydrogen

84.

Rusting is an example of

a)

oxidation

b)

reduction

85.

Raising the temperature of a chemical reaction would make the reaction __________________.

a)

happen slower

b)

stop completely

c)

happen faster

d)

proceed as normal

86.

How do chemical reactions turn substances into new substances?

a)

with burning acid

b)

the atoms break apart and combine back together in new ways

c)

the molecules mix together and create new substances

d)

the ionic compounds mix in water to form solutions

87.

which gas is important for the burning of substances?

a)

Sulfur

b)

Carbon

c)

Oxygen

88.

Burning of fossil fuels:

a)

Reversible

b)

Irreversible

Similar Resources on Wayground

Science Exam Review

83 questions

Science Exam Review

quiz

Worksheet

•

5th - 9th Grade

CFA 2 Review Periodic Table

87 questions

CFA 2 Review Periodic Table

quiz

Worksheet

•

7th Grade

HW4: 8.24

85 questions

HW4: 8.24

quiz

Worksheet

•

7th Grade

Skills of Science Review

83 questions

Skills of Science Review

quiz

Worksheet

•

7th Grade

Solar System and Beyond

90 questions

Solar System and Beyond

quiz

Worksheet

•

6th - 8th Grade

Mid term

84 questions

Mid term

quiz

Worksheet

•

6th - 8th Grade

Science Review

83 questions

Science Review

quiz

Worksheet

•

6th - 8th Grade