wayground logo

Free Printable Worksheets

Font size

S
M
L
XL
Worksheets

WORK ON THIS-Chapter 3 Review--Chemistry I

Total questions: 121

Worksheet time: 3hrs 57mins

Name
Class
Date
1.

In a reaction A + B ----> C,  reactant A has 5g and product  C has 9g. How many grams does reactant B should have? 

(a)  

2.
What will weigh more when a chemical change is complete?  The reactants before the chemical reaction, or the product after the reaction is complete?
a)
They both will weigh the same
b)
The product always weighs more than the reactant
c)
The reactant will weigh more than the product
d)
They both will loose mass after the reaction
3.

How many oxygen atoms are in this chemical formula?

(a)  

4.

How many O's are in Al₂(SO₄)₃

(a)  

5.
How many Aluminum are in Al2O3?
a)
3
b)
2
c)
5
6.
How many Sodium (Na) are in 6NaCl?
a)
1
b)
12
c)
6
7.

How many Mn atoms are found in the following compound?
3Cr(MnO4)6

(a)  

8.

The law of definite proportions states that a given chemical compound always contains the same ____ in the exact same ____by mass.

a)

elements, compounds

b)

elements, molecules

c)

elements, proportions

d)

proportions, elements

9.

The _____ states that, regardless of the amount, a compound is always composed of the same elements in the same proportion by mass

a)

law of definite proportions

b)

law of conservation of mass

c)

law of multiple proportions

d)

periodic table

10.
the smallest particle of an element that retains the chemical properties of that element
a)
ion
b)

compound

c)
atom
d)
element
11.

The Law of Conservation of matter states that the total amount of matter ______________ after it undergoes change/rearrangement.

a)
disappears
b)
stays the same
c)
weighs less
d)
explodes
12.

Who was the first person to "think" of an atom?

a)

Democritus

b)

J.J. Thompson

c)

Rutherford

d)

Bohr

13.

What experiment was used to discover the nucleus?

a)

Cathode Ray Tube

b)

Gold Foil

c)

Chromatography

d)

Gel Electrophorese

14.

Which one of these is Dalton's Model?

a)
b)
c)
d)
15.

Who discovered the nucleus?

a)

Rutherford

b)

Bohr

c)

J.J. Thompson

d)

Democritus

16.

What experiment was used to discover electrons?

a)

Cathode Ray Tube

b)

Gold Foil

c)

Chromatography

d)

Gel Electrophorese

17.
The positive particles of an atom are 
a)
electrons 
b)
positrons 
c)
neutrons 
d)
protons 
18.
The central region of an atom where neutrons and protons are located is the __________________.
a)
nucleus 
b)
electron cloud
c)
core 
d)
center 
19.
Matter always has mass.
a)
true
b)
false
20.

Democritus was known for

a)

discovering the electron

b)

discovering the proton

c)

creating the term atom, meaning indivisible

d)

discovering the nucleus

21.
What contribution did John Dalton make to atomic theory? 
a)
He discovered that every atom was positively charged. 
b)
He discovered that every element consisted of one type of atom that couldn't be divided. 
c)
He discovered that atoms had nuclei. 
d)
He discovered that atoms could be divided into smaller parts. 
22.
The word atom comes from a Greek word "atomos" that means
a)
Invisible
b)
Indivisible
c)
Undivided
d)
Indestructable 
23.

3. Atoms cannot be subdivided, _________ or __________.

a)

divided or conquered

b)

created or destroyed

c)

bought or sold

d)

to be or not to be

24.

What is a negatively charged particle?

a)

neutron

b)

electron

c)

proton

d)

atom

25.

Who came up with the first atomic theory?

a)

Dalton

b)

Socrates

c)

Thomas

d)

Rutherford

26.

What is a particle with no charge?

a)

neutron

b)

electron

c)

proton

d)

atom

27.

Who discover the electron?

a)

Dalton

b)

Rutherford

c)

Thomson

d)

Bohr

28.
A tiny but very dense, positively charged portion of the atom that holds most of the atomic mass
a)
Electron Shells
b)
Orbitals
c)
Electron Cloud
d)
Nucleus
29.
J.J. Thomson provided evidence that an atom...
a)
is the smallest particle of matter
b)
contains negatively and positively charged particles
c)
has an overall negative charge
d)
has an overall positive charge
30.

What determines the identity of the atom?

a)

protons

b)

neutrons

c)

electrons

d)

isotopes

31.

Who used the Gold Foil Experiment?

a)

Ernest Rutherford

b)

Democritus

c)

Erwin Schrodinger

d)

Niels Bohr

32.
If reaction starts with 20g of reactants it should produce 
a)
a total of 40g of products
b)
a total of 10g of products
c)
a total of 80 g of products
d)
a total of 20g of products
33.

Where are the electrons located?

a)

o outside the nucleus

b)

o inside the nucleus

c)

o in the middle of the atom

d)

o in areas that contribute to the atom's mass

34.
What would two different isotopes of an atom have in common?
a)
Number of neutrons 
b)
Number of protons
c)
Atomic weight 
d)
Atomic mass
35.
What is the atomic number?
a)
the number of protons
b)
the number of protons and neutrons
c)
the number of neutrons
d)
the number of protons and electrons
36.
What is the mass number defined as?
a)
the number of protons
b)
the number of protons and neutrons
c)
the number of neutrons
d)
the number of protons and electrons
37.

What is the atomic number of this atom?

(a)  

38.

What is the mass number of this atom?

a)

1

b)

3

c)

4

d)

7

39.

What is the atomic number of Barium? (enlarge the periodic table)

(a)  

40.

How many protons are in a sodium atom? (tap to enlarge the periodic table)

(a)  

41.

Atoms of the same element which have a different number of neutrons are called _________________.

a)

ions

b)

isotopes

c)

quarks

d)

molecules

42.

Which subatomic particle has a negative charge in the atom?

a)

proton

b)

neutron

c)

electron

d)

quark

43.

How many neutrons does Carbon-14 contain? (tap to enlarge the image)

(a)  

44.

How many neutrons does an atom of the isotope Neon-22 have? (tap to enlarge the image)

a)

12

b)

10

c)

22

d)

20

45.

How many electrons are in an atom with an atomic number of 50?

(a)  

46.

ALL atoms of the same element have:

a)

same number of proton

b)

same number of nucleon

c)

different number of neutron

d)

different number of electron

47.
What do these isotopes of carbon all have in common?
a)
neutrons & mass number
b)
atomic number and neutrons
c)
atomic number and electrons
d)
protons, atomic number, and mass number
48.
which atom has  4 neutrons?
a)
Li-6
b)
Li-7
c)
Li-8
d)
they have the same # of neutrons
49.
What quantities vary between isotopes of an element?
a)
protons, electrons, and atomic mass
b)
protons, electrons, and atomic number
c)
neutrons and electrons
d)
neutrons and atomic mass
50.

How many protons in Carbon-14?

(a)  

51.
If X is the symbol for an element, which of the following two symbols represent    isotopes of the same element?     I. 7735X  II. 7733X  III. 8137X  IV. 8135 X
a)
I and II
b)
III and IV
c)
I and IV
d)
I and III
52.
How many neutrons does the isotope below have?     89 36Kr
a)
53
b)
36
c)
89
d)
125
53.
What is the number of protons that the element in this image contain?
a)
14
b)
7
c)
15
d)
18
54.
Elements can have the same number of protons?
a)
True
b)
False
55.
Which subatomic particles contribute the most to the mass of an atom?
a)
Protons, Neutrons, Electrons
b)
Protons only
c)
Protons and Electrons
d)
Protons and Neutrons
56.
The number of protons is equal to 
a)
the atomic number
b)
the number of neutrons
c)
the energy levels
d)
the periodic table groups
57.

If an atom has 12 neutrons and 11 protons, what is its atomic mass?

(a)  

58.

How many neutrons does the isotope of lithium have?

(a)  

59.
How many protons does this isotope of titanium have?
a)
48
b)
22
c)
26
d)
70
60.
In a correctly written symbol what would be located in the "A" position?
a)
number of neutrons
b)
atomic number
c)
number of electrons 
d)
mass number
61.
Oxygen has 8 protons. What is oxygen's atomic number?
a)
16
b)
8
c)
15.999
d)
0
62.

What is the atomic number for Ar, argon?

(a)  

63.

What is the atomic number for Al, aluminum?

(a)  

64.

What is the atomic number for iron?

(a)  

65.
What is the atomic number of this atom?
a)
4
b)
5
c)
9
d)
none of the above
66.

What is the symbol of this atom?

(a)  

67.

What is the mass number of an atom that contains 9 protons, 10 neutrons, and 9 electrons?

a)

9 amu

b)

10 amu

c)

18 amu

d)

19 amu

68.

What is the mass number of an atom that contains 8 protons, 9 neutrons, and 8 electrons?

a)

8 amu

b)

9 amu

c)

16 amu

d)

17 amu

69.

Subatomic particles that are neutral in charge and found in the nucleus

a)
Neutrons
b)
Protons
c)
Nucleus 
d)
Electrons
70.

An atom and an isotope describe the SAME element. How are they different?

a)

chemical name

b)

number of protons

c)

number of neutrons

d)

number of electrons

71.

The element in the box has how many neutrons?

(a)  

72.

How to determine the number of neutrons of a strontium-86 isotope?

a)

add the protons and neutrons

b)

subtract the atomic number from the mass number, 86

c)

add protons and electrons

d)

subtract the mass number, 86, from the atomic number

73.

The charge of magnesium ion is +2, which means

a)

magnesium gains 2 electrons

b)

magnesium give away 2 electrons

c)

magnesium gains 2 protons

d)

magnesium give away protons

74.

Which one is an ion?

a)
b)
c)
75.

How would you write a Sulfur that has gained 2 electrons?

a)

S+2

b)

S-2

c)

S+6

d)

S-6

76.

How many electrons are in Aluminium?

a)

40

b)

27

c)

13

d)

14

77.

How many electrons are in Potassium if the charge is a +1, K+

(a)  

78.

O2- How many electrons are in this anion?

(a)  

79.

What is the formula weight of Cs2SO4 ?

a)

361.9g

b)

361.8g

c)

313.9g

d)

180g

80.

What is the number of neutrons for Oxygen-18

a)

8

b)

10

c)

16

d)

18

81.

Find the mass of 3.8 mol of H2O. Round to the nearest tenth.

a)

57.9 g

b)

54.8 g

c)

68.5 g

d)

62.3 g

82.

How many molecules are there in 31.8 moles of water? (H2O has a molar mass of 18.0 g/mol)

a)

572 g

b)

1.91 x 1025 molecules

c)

5.28x 10-25 molecules

d)

1.77 g

83.

How many atoms are present in a 0.0254 mole sample of gold?

a)

0.25 atoms

b)

1.528 x 1022 atoms

c)

4.22 x 10-25 atoms

d)

5 atoms

84.

What is Avogadro's Number? 

(a)  

85.
Which of the following dimensional analysis setups will correctly convert 2.50 moles of sodium to grams of sodium?
a)
A
b)
B
c)
C
d)
D
86.

Dalton named the tiny particles atoms. What Greek word does "atom" originate from?

a)

"Kratos"

b)

"Deinos"

c)

"Atomus"

d)

"Atomos"

87.

Which THREE postulates of Dalton's atomic theory have been proven false by later research?

a)

All matter is made up of atoms

b)

Atoms are indivisible and indestructible

c)

Atoms of different elements have different masses

d)

All atoms of the same element have identical properties

e)

Atoms combine in fixed, whole-number ratios to form compounds

88.

The observations of who led us to the law of definite proportions?

a)

Dalton

b)

Thomson

c)

Rutherford

d)

Bohr

89.

The main ideas behind John Dalton's atomic model were what?

a)

electrons surround the nucleus in specific energy levels

b)

the atom is indivisible can't be divided into smaller parts

c)

the atom is mostly empty space with a dense and positive nucleus

d)

electrons are located inside a positive sea of the atom

90.

Why has our model of the atom changed over time?

a)

Scientists are becoming better at guessing models as time passes

b)

Increased spiritual prayer and revelation has given us this data

c)

new data has become available through experiments and observation

d)

Popular social media influencers on YouTube and Instagram are informing the public

91.

What results did Rutherford observe in his Gold-Foil experiment?

a)

He observed that all alpha particles did go through a gold-foil in straight lines

b)

He observed that most alpha particles did not go through a gold-foil and stopped on one side of the gold foil.

c)

He observed that a small number of alpha particles bounced off the gold-foil at very large angles

d)

He observed that all alpha particles slightly deflected from the straight line when going through a gold-foil

92.

Choose one of the conclusions that Ernest Rutherford made based on the experimental results of his Gold-Foil experiment

a)

He concluded that the atom is indivisible

b)

He concluded that the atom is mostly empty space

c)

He concluded that the atom has neutrons

d)

He concluded that the atom is tightly packed with subatomic particles all mixed together

93.

What is the nucleus of the atom?

a)

It is a centra organel of a cell

b)

It is a center of a fruit

c)

It is a very dense cenral core of an atom that has a positive charge

d)

It is a very dense cenral core of an atom that has a negative charge

94.
Matter always has mass.
a)
true
b)
false
95.

Which atom has the largest atomic mass?

a)

K

b)

Fr

c)

Rb

d)

Cs

96.

Which element has the greatest number of protons?

a)

I

b)

Br

c)

Cl

d)

F

97.

Which element has the lowest number of electrons?

a)

I

b)

Br

c)

Cl

d)

F

98.

The atom with the largest atomic number in Group 18 is - 

a)
Ar
b)
He
c)
Kr
d)
Rn
99.

Which of the following will has a smaller number of protons than Zinc?

a)
Gallium
b)

Gold

c)
Magnesium
d)
Strontium
100.

As you move left to right across a period, the atomic mass

a)

increases

b)

decreases

101.

Which of these has a greater need for electrons?

a)

Ca

b)

Ba

102.

Which subatomic particle is used to identify the atom, as it never changes?

a)

protons

b)

neutrons

c)

electrons

103.

What is the molar mass for zinc hydroxide, Zn(OH)2?

a)

83.4 g/mol

b)

99.4 g/mol

c)

99.4 moles

d)

99.4 g

104.

How many moles are in 2.35 g H2O? (*Hint: molar mass is grams per 1 mole)

a)

0.13 mols

b)

13 mols

c)

1.3 mols

d)

130 mols

105.

How many moles are in 106.3 g of Copper, Cu? (*Hint: molar mass is grams per 1 mole)

a)

1.7 moles

b)

1.673 moles

c)

1.673 x 10 23 moles

d)

63.55 moles

106.
Which would have more atoms?
a)

1 mole of lithium (Li)

b)

1 mole of gold (Au)

c)

1 mole of silicon (Si)

d)

All of these have the same amount of atoms

107.

How many particles are in 1 mole?

a)

6.022⋅10236.022\cdot10^{23}  particles

b)

It's depends on the molar mass

c)

It's equal to the atomic number

d)

6.022

108.

How many atoms are in 1 mole of Gallium (Ga)?

a)

It depends on the molar mass

b)

69.723 atoms

c)

31 ⋅102331\ \cdot10^{23}  atoms

d)

6.022 ⋅10236.022\ \cdot10^{23}  atoms

109.

1 mole of NaOCl contains _______ molecules?

a)

7.44⋅1017.44\cdot10^1  molecules

b)

74.44 molecules

c)

6.022⋅10236.022\cdot10^{23}  molecules

d)

6.022 molecules

110.

What is the molar mass of fluorine gas, F2?

a)

18.998 g/mol

b)

38 g/mol

c)

9 g/mol

d)

18 g/mol

111.
How many moles are in 3.01 x 1022 atoms of magnesium?
a)
0.0500 moles
b)
1.81 x 1046 moles
c)
5.00 x 1021 moles
d)
5.00 moles
112.

Avogadro's Constant, L, always refers to....

a)

The number of particles in one mole

b)

The number of moles in one gram

c)

The number of atoms in one mole

d)

The atomic mass of each element

e)

The number of molecules in one mole

113.
How many molecules are in 2.00 moles of H2O?
a)
124x1024 molecules of H2O
b)
1.20x1023 molecules of H2O
c)
1.20x1024 molecules H2O
d)
124
114.

How many molecules of sodium acetate are in 0.87 moles of sodium acetate (NaC2H3O2)?

a)

9.3 x 10-24 molecules NaC2H3O2

b)

5.2 x 1023 molecules NaC2H3O2

c)

1.4 x 10-24 molecules NaC2H3O2

d)

3.7 x 10-24 molecules NaC2H3O2

115.

Convert 4.77 x 1024 molecules of SO2 to grams.

a)

4.84 x 10-22 g SO2

b)

.124 g SO2

c)

1.84 x 1050 g SO2

d)

508 g SO2

116.

How many atoms are in a sample of table salt (NaCl) with a mass of 67.69 grams? (Molar Mass NaCl = 58.44 g/mol)

a)

1.92 x 1024 atoms

b)

2.39 x 1027 atoms

c)

6.97 x 1023 atoms

d)

5.43 x 1025 atoms

117.

Convert 2.4 x 1021 atoms of magnesium hydroxide (Mg(OH)2) to grams. (Molar Mass Mg(OH)2 = 58.32 g/mol)

a)

6.84 x 10-5 g Mg(OH)2

b)

8.42 x 1046 g Mg(OH)2

c)

0.23 g Mg(OH)2

d)

0.0040 g Mg(OH)2

118.

How many oxygen atoms are in 4.77 x 1024 molecules of SO2

a)

6.022 x 1022 O atoms

b)

0.64 atoms SO2

c)

9.54 x 1024 O atoms

d)

2.38 x 1024 O atoms

119.

How many H atoms are in 5.40 x 10 23 molecules of C2H3O2NH4 ?

a)

1.6 x 10 24 H atoms

b)

3.8 x 10 H 24 atoms

c)

3.78 x 10 24 H atoms

d)

6.02 x 10 23 H atoms

120.

What is the mass of 2 moles of propane C3H8?

a)

88.22 g

b)
88 g
c)

90 g

d)

80 g

121.

The molar mass of B2(CO3)3 is...

a)

201.65 grams

b)

153.65 grams

c)

79.654 grams

d)

213.64 grams

Similar Resources on Wayground

Interactive 2 entry test

10 questions

Interactive 2 entry test

quiz

Worksheet

•

5th - 6th Grade

Gerunds and technology

10 questions

Gerunds and technology

quiz

Worksheet

•

University

3a1. Unit 17.2

10 questions

3a1. Unit 17.2

quiz

Worksheet

•

3rd Grade

Karunakara Narayana - Indian Dance Quiz (C)

10 questions

Karunakara Narayana - Indian Dance Quiz (C)

quiz

Worksheet

•

2nd Grade

quiz

10 questions

quiz

quiz

Worksheet

•

5th Grade

NCERT class 8 Materials : Metals and Non - Metals

10 questions

NCERT class 8 Materials : Metals and Non - Metals

quiz

Worksheet

•

8th Grade

NUMBER NUMERATION QUIZ- A

10 questions

NUMBER NUMERATION QUIZ- A

quiz

Worksheet

•

3rd Grade

Q2M9 - PETA II - Average Roound

10 questions

Q2M9 - PETA II - Average Roound

quiz

Worksheet

•

Professional Development