wayground logo

Free Printable Worksheets

Font size

S
M
L
XL
Worksheets

Grade 9 4th quarter

Total questions: 122

Worksheet time: 2hrs 53mins

Name
Class
Date
1.
What is at the center of every atom?
a)
An electron
b)
A compound
c)
A nucleus
d)
A molecule
2.

Water (H2O), is not found on the periodic table because water is a...

a)

atom

b)

liquid

c)

mixture

d)

compound

3.

When the elements copper (Cu) and oxygen (O) chemically combine, they form...

a)

an ion

b)

a gas

c)

a compound

d)

a mixture

4.

This image is a model of...

a)

an element

b)

a compound

c)

a homogenous mixture

d)

a heterogeneous mixture

5.

This picture is a model of...

a)

an element

b)

a compound

c)

a homogenious mixture

d)

a heterogeneous mixture.

6.
A pure substance that cannot be separated into simpler substances by chemical or physical means.  
a)
Element
b)
Compound
c)
Mixture
d)
Chemical
7.
These contain only one kind of atom. 
a)
element 
b)
compound 
c)
mixture 
d)
water 
8.
Atoms with similar properties are most likely located...
a)
in the same period.
b)
in the same group.
c)
in different periods.
d)
to the right and left of each other.
9.
A proton is....
a)
A negatively charged subatomic particle
b)
A positively charged subatomic particle
c)
A neutrally charged subatomic particle
d)
The only subatomic particle located in the nucleus
10.
A neutron has a charge of
a)
+2
b)
No charge
c)
-1
d)
+1
11.
Which is a neutron?
a)
A
b)
B
c)
C
12.
Who first developed the Periodic Table?
a)
Mendeleev
b)
Mosely
c)
Mendella
d)
Murphy
13.
Which statement correctly describes the 2 electrodes?
a)
The anode is negative and the cathode is positive
b)
The anode and cathode are both positive
c)
The anode is positive and the cathode is negative
d)
The anode and cathode are both negative.
14.
Positive ions (cations) will move towards the cathode (-) where they will discharge by....
a)
Breaking apart
b)
Losing electrons
c)
Clumping together.
d)
Gaining electrons
15.
What is electrolysis?
a)
breaking down of a compound using a current
b)
making a compound using a current
16.

What were John Dalton three contributions to atomic history?

a)

Created the atomic theory

b)

Discovered that the atom is mostly empty space

c)

Believed that atoms of a given element are identical

d)

Hypothesized that the atom is a tiny, hard sphere

e)

Believed that the universe was made of tiny "uncuttable" particles

17.

Who was the first contributor to the atomic theory?

a)

John Dalton

b)

Ernest Rutherford

c)

JJ Thompson

d)

Democritus

e)

Neils Bohr

18.
Which scientist saw the atom as a solid sphere?
a)
Dalton
b)
Thomson
c)
Rutherford
d)
Bohr
19.
In Dalton's Atomic Theory, all elements consist of __________ that cannot be divided.
a)
Atoms
b)
Parts
c)
Molecules
d)
Hydrogen
20.

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

21.
the smallest particle of an element that retains the chemical properties of that element
a)
ion
b)
isotope
c)
atom
d)
element
22.
True or False? John Dalton believed that moving electrons exist in electron clouds around the nucleus. 
a)
False
b)
True 
23.
Which scientist developed the atomic theory?
a)
JJ Thomson
b)
Ernest Rutherford
c)
John Dalton
d)
James Chadwick
24.

He claimed that matter was made of small, hard particles that he called “atomos.”

a)

Democritis

b)

Dalton

c)

Moseley

d)

Einstein

25.

Periods are ___________ on the periodic table.

a)

horizontal rows

b)

vertical columns

c)

left to right diagona

d)

right to left diagonals

26.

Consider the table below. In a sample of 100.0 grams of sucrose, what would be the expected mass of hydrogen?

a)

42.20 grams

b)

51.30 grams

c)

6.50 grams

d)

100.0 grams

27.

In the table below, why are the mass ratios of copper to chlorine not the same for compound I and compound II?

a)

experimental error

b)

the two compounds are not the same

c)

there is another element not shown

d)

the copper changes to chlorine in compound II

28.

A material that cannot be broken down further by chemical means is a(n):

a)

substance

b)

element

c)

mixture

d)

compound

29.

Fe2O3 is a(n) _____________.

a)

compound

b)

element

c)

heterogeneous mixture

d)

homogeneous mixture

30.

As water or hydrogen peroxide break down to hydrogen and oxygen, they change from ____________ to ____________.

a)

homogeneous mixtures: heterogeneous mixtures

b)

elements : compounds

c)

compounds : elements

d)

heterogeneous mixtures : compounds

31.

Sucrose is composed of carbon, hydrogen, and oxygen. Which of the following data is NOT needed in order to determine the percent by mass of the three elements?

a)

mass of carbon in sucrose sample

b)

mass of hydrogen in sucrose sample

c)

total mass of the sucrose sample

d)

atomic numbers of the elements

32.

Which is a compound?

a)

sodium

b)

sea water

c)

carbon dioxide

d)

brass

33.

A 20.0-gram sample of sucrose contains 8.4 g of carbon. What is the mass percentage of carbon in sucrose?

a)

28.4 %

b)

42 %

c)

100 %

d)

238 %

34.

Sucrose is 51.5 % oxygen. How many grams of oxygen are in 20.0 gram of sucrose?

a)

2.57 %

b)

10.3 %

c)

38 %

d)

50 %

35.

A 2-gram sample of sucrose is 6.50% hydrogen. What is the mass percentage of hydrogen in 300 gram of sucrose?

a)

4 %

b)

6.5 %

c)

10 %

d)

50 %

36.

A 25.0-gram sample of magnesium oxide contains 10.8 grams of magnesium. What is the percent of oxygen by mass in this compound?

a)

89.2 %

b)

14.2 %

c)

43.2 %

d)

56.8 %

37.

Which of the following substances is an element?

a)

Baking soda

b)

Iron

c)

Salt

d)

Sugar

38.

A chemical composition of two or more different elements joined together in fixed proportions is known as a(n) ____________.

a)

compound

b)

element

c)

homogeneous mixture

d)

heterogeneous mixture

39.

The law of ________ states that a compound is always composed of the same elements in the same proportion by mass.

a)

conservation of energy

b)

conservation of mass

c)

definite proportions

d)

multiple proportions

40.

All of the following compounds applied the Law of “Multiple proportions” EXCEPT:

a)

H2O , H2O2

b)

CO , CO2

c)

NO , NO2

d)

HCl , HBr

41.

Democritus believed that matter was made up of:

a)

earth

b)

fire

c)

atoms

d)

water

42.

Which of the following parts of John Dalton's atomic theory were NOT correct?

a)

matter is composed of atoms

b)

atoms are indivisible

c)

atoms of one element differ from atoms of another

d)

atoms combine to form compounds

43.

Which of the fallowing was NOT a feature of John Dalton's atomic research?

a)

careful observations and measurements

b)

discovery of the atom's internal structure

c)

mass ratios of elements involved in chemical reactions

d)

experiments that refined and supported his hypothesis

44.

What can you conclude from the deflection of a cathode ray in a magnetic field?

a)

The ray must be composed of charged particles.

b)

The ray must be composed of iron.

c)

The ray must have a positive charge

d)

The ray must need to travel in a vacuum

45.

What properties did Rutherford use in the design of the gold foil experiment?

a)

alpha particle's negative charge and random distribution of protons

b)

alpha particle's negative charge and gold foil's positive charge

c)

alpha particle's positive charge and electron's negative charge

d)

positively charged electrons distributed in a uniform negative charge

46.

Which of the following particles has a mass that is almost the same as the mass of a proton?

a)

neutron

b)

electron

c)

positron

d)

beta particle

47.

Which scientist determined that almost all of an atom's mass of is located in its nucleus?

a)

Dalton

b)

Democritus

c)

Rutherford

d)

Thomson

48.

In the plum pudding model of the atom, where is most of the mass of the atom?

a)

in the electrons

b)

in the matter between the electrons

c)

in the nucleus

d)

in the protons

49.

Which scientist determined the mass of electron?

a)

Dalton

b)

Thomson

c)

Millikan

d)

Rutherford

50.

What is the negatively charged particle in an atom?

a)

proton

b)

positron

c)

neutron

d)

electron

51.

Which of the following statements is correct?

a)

an electron is about 2000 times more massive than a proton

b)

a proton is about 2000 times more massive than an electron

c)

a neutron will always be found orbiting the nucleus

d)

the nucleus is negatively charged

52.

A substance that cannot be separated into simpler substances by physical or chemical means is a(n)

a)

compound

b)

mixture

c)

element

d)

period

53.

A chemical combination of two or more different elements is a(n)

a)

solution

b)

compound

c)

element

d)

period

54.

Which of the following is an example of an element?

a)

water

b)

air

c)

sugar

d)

oxygen

55.

Which of the following is an example of a compound?

a)

gold

b)

silver

c)

aspirin

d)

copper

56.

What are the horizontal rows in the periodic table called?

a)

block elements

b)

groups or families

c)

grids

d)

periods

57.

What are the vertical columns in the periodic table called?

a)

block elements

b)

groups or families

c)

grids

d)

periods

58.
Which scientist developed the atomic theory
a)
Aristotle
b)
Dalton
c)
Democritus
59.
Atoms are made up of three basic parts, which are -
a)
Protons, neutrons, electrons
b)
neutrinos, protons, neutrons
c)
quarks, protons, electrons
d)
electrons, neutrons, and quarks
60.
The nucleus is made up of -
a)
neutrons and electrons
b)
protons and neutrons
c)
protons and electrons
d)
electrons and quarks
61.
Protons have this charge -
a)
positive
b)
negative
c)
neutral
d)
no charge
62.
Electrons have this charge - 
a)
positive
b)
negative
c)
neutral
d)
no charge
63.
Neutrons have this charge -
a)
positive
b)
negative
c)
neutral
d)
They don't exist
64.
What scientist is best known for his "Plum Pudding" model of the atom?
a)
J.J. Tomson
b)
Ernest Rutherford
c)
John Dalton
d)
Democritus
65.
Place the following scientists in order, from earliest to latest: 
A) Ernest Rutherford
B) J.J. Thomson
C) John Dalton
a)
B,C,A
b)
C,A,B
c)
A,C,B
d)
C,B,A
66.
An atom's overall charge is ________.
a)
positive 
b)
depends
c)
neutral 
d)
negative 
67.
J.J. Thomson provided evidence that an atom...
a)
is the smallest particle of matter
b)
contains negatively charged particles
c)
has an overall negative charge
d)
has an overall positive charge
68.
Rutherford's gold foil experiment provided evidence that...
a)
negative and positive charges are spread evenly throughout the atom.
b)
alpha particles have a positive charge.
c)
gold is not a dense as previously thought.
d)
there is a dense positively charged nucleus at the center of an atom.
69.
An atom's overall charge is ________.
a)
positive 
b)
depends
c)
neutral 
d)
negative 
70.
Ernst Rutherford discovered which part of the atom through the use of gold foil?
a)
Proton
b)
Neutron
c)
Electron
d)
Orbitals
71.
The particles that are found in the nucleus of an atom are
a)
neutrons and electrons
b)
electrons only
c)
protons and neutrons
d)
protons and electrons
72.

Which part of the atomic theory did JJ Thomson prove?

a)

there are electrons

b)

electrons are in energy levels

c)

there is a nucleus

d)

cathode ray tube

73.

What experiment did JJ Thomson use?

a)

gold foil experiment

b)

cathode ray tube experiment

74.

John Dalton wrote postulates to make the idea of the atom useful. Which postulate below was proven wrong?

a)

All elements are made up of tiny indivisible particles called atoms.

b)

The atoms of one element are different from the atoms of another element.

c)

Atoms of different elements chemically combine to form chemical compounds.

d)

During chemical reactions, atoms are rearranged.

75.

JJ Thomson came up with which model for the atom?

a)

planetary model

b)

electron cloud model

c)

plum pudding model

d)

nuclear model

76.

The number of protons is equal to the number of electrons for an atom. This means an atom is-

a)

electrically neutral

b)

electrically positive

c)

electrically negative

77.

Which subatomic particle has a neutral charge?

a)

protons

b)

neutrons

c)

electrons

d)

isotope

78.

After Rutherford discovered the nucleus, which model is believed to be true?

a)

protons, neutrons, and electrons are evenly distributed

b)

the nucleus is made of protons, neutrons, and electrons

c)

the nucleus is made of protons and electrons

d)

the model is mostly empty space with a central nucleus

79.
"Everything is composed of atoms" was stated by:
a)
Democritis
b)
Dalton
c)
Moseley
d)
Einstein
80.
John Dalton stated:
a)
elements are made of atoms
b)
atoms of a given element are identical
c)
atoms cannot be subdivided, created, nor destroyed
d)
all of the above
81.
The scientist responsible for "discovering" the nucleus is:
a)
Bohr
b)
Rutherford
c)
Schroedinger
d)
Einstein
82.
The nucleus of an atom can be described as:
a)
spacious and negatively charged
b)
dense and positively charged
c)
spacious and positively charged
d)
dense and negatively charged
83.
How did Rutherford discover the proton?
a)
Cathode tube ray experiment
b)
Gold Foil Experiment
c)
Planetary Model
d)
Plum Pudding Model
84.
What does the nucleus of an atom contain?
a)
Electrons and neutrons
b)
Protons and neutrons
c)
Neutrinos and positrons
d)
DNA and RN
85.
True or False: The majority of an atom is made up of empty space
a)
True
b)
False
86.
What scientist is best known for his "Plum Pudding" model of the atom?
a)
J.J. Thomson
b)
Ernest Rutherford
c)
John Dalton
d)
Democritus
87.
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. 
88.
Rutherford's gold foil experiment provided evidence that...
a)
negative and positive charges are spread evenly throughout the atom.
b)
alpha particles have a positive charge.
c)
gold is not a dense as previously thought.
d)
there is a dense positively charged nucleus at the center of an atom.
89.
The first person to propose a theory about an atom called the Atomos Theory was
a)
Democritus
b)
Rutherford
c)
Dalton
d)
Aristotle
90.
Who discovered the nucleus using the gold foil experiment?
a)
Democritus
b)
Robert Millikan
c)
James Chadwick
d)
Ernest Rutherford
91.
He discovered the electron using cathode ray tube experiment.
a)
Joseph Thomson
b)
John Dalton
c)
Ernest Rutherford
d)
Robert Millikan
92.
He first measured the mass and charge of an electron using the oil drop experiment.
a)
Joseph Thomson
b)
Robert Millikan
c)
John Dalton
d)
Niels Bohr
93.
How did Thomson build upon Dalton's model? 
a)
His model was the same.
b)
He put electrons in orbitals.
c)
He discovered the nucleus.
d)
He discovere subatomic particles (electron).
94.
Who's model is this? 
a)
Millikan
b)
Rutherford
c)
Thomson
d)
Bohr
95.
Which scientist developed the atomic theory?
a)
JJ Thomson
b)
Ernest Rutherford
c)
John Dalton
d)
James Chadwick
96.
James Chadwick discovered the ________.
a)
proton
b)
neutron
c)
electron
d)
nucleus
97.
What did Thomson discover?
a)
electron
b)
proton
c)
neutron
d)
electron cloud
98.

Subatomic particles with a negative charge

a)

Electrons

b)

Neutrons

c)

Protons

d)

Quarks

99.
Subatomic particles with a positive charge
a)
neutrons
b)
atomic mass
c)
protons
d)
isotopes
100.
Subatomic particles that are neutral in charge
a)
Neutrons
b)
Protons
c)
Nucleus 
d)
Electrons
101.
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
102.

He claimed that matter was made of small, hard particles that he called “atomos.”

a)

Democritis

b)

Dalton

c)

Moseley

d)

Einstein

103.
The scientist responsible for "discovering" the nucleus is:
a)
Bohr
b)
Rutherford
c)
Schroedinger
d)
Einstein
104.

John Dalton stated:

a)

Atoms are tiny, invisible particles.

b)

Atoms of one element are all the same.

c)

Atoms of different elements are different.

d)

Compounds form by combining atoms.

e)

All of the statements listed.

105.
What does the nucleus of an atom contain?
a)
Electrons and neutrons
b)
Protons and neutrons
c)
Neutrinos and positrons
d)
DNA and RN
106.
Rutherford concluded that the atom
a)
has a nucleus with a positive charge
b)
has a nucleus with a negative charge 
c)
is a small mass with negative and positive charges
d)
contains a nucleus without a charge
107.

how Rutherford discovered that the atom consists of a small, massive, positively charged nucleus

a)

reading quantum mechanics books

b)

by mixing substances

c)

thanks to the The gold-foil experiment

d)

exposing it to the heat

108.

how is structured Rutherford atom?

a)

composed by elements beingg a single and indivisable matter

b)

a sphere of uniform positive mass, in which the negative charges were inserted

c)

electrons revolve in circular orbits around the nucleus, occupying the lowest energy orbit

d)

nucleous in the middle sorrunded by electrons circuling at some distance

109.

From his experiments, J. J. Thomson concluded that

a)

cathode ray particles can move at very fast speeds.

b)

cathode ray particles can be moved by electric current.

c)

atoms contain small positively charged particles that are called protons.

d)

atoms contain small negatively charged particles that are called electrons.

110.

Which particle is J.J. Thomson credited with discovering?

a)

electron

b)

neutron

c)

proton

d)

photon

111.

Which conclusion could be made from Ernest Rutherford’s gold foil experiment?

a)

Atoms are made up of mostly empty space.

b)

Atoms are mainly solid and block alpha particles.

c)

The volume of the nucleus is large compared to the rest of the atom.

d)

The mass of the nucleus is small compared to the rest of the atom.

112.

What did Ernest Rutherford’s gold foil experiment demonstrate about atoms?

a)

Their positive charge is located in a small region that is called the nucleus.

b)

Their negative charge is located in small particles that are called electrons.

c)

Their nucleus makes up the majority of the volume of the atom.

d)

Their electrons are floating in a sea of positive charges.

113.

Which statement best summarizes the importance of Ernest Rutherford’s gold foil experiment?

a)

It proved that all of John Dalton's postulates were true.

b)

It verified J.J. Thomson's work on the atomic structure.

c)

It showed that an electron circles a nucleus in a fixed-energy orbit.

d)

It showed that a nucleus occupies a small part of the whole atom.

114.

Which activity BEST demonstrates Ernest Rutherford's creativity?

a)

questioning the correctness of the plum pudding model

b)

designing an experiment to test the plum pudding model

c)

making observations about the gold foil experiment.

d)

Summarizing the conclusions from the gold foil experiment as a theory.

115.

Whose work directly resulted in the development of an atomic model that has negative electrons stuck within a sea of positive material?

a)

Democritus

b)

Rutherford

c)

Thomson

d)

Dalton

116.

Early ideas of matter being composed of earth, wind, water, and fire were proposed by

a)

Democritus

b)

Zeus

c)

Einstein

d)

Aristotle

117.

Democritus was a philosopher who opposed Aristotle; his idea of the atom was that it was made of indivisible particles called

a)

atomos

b)

matter

c)

indivison

d)

stuff

118.

Which device did JJ Thomson use to discover the electron?

a)

X-ray machine

b)

scanning tunneling electron microscope

c)

spectrometer

d)

cathode ray tube

119.

The atomic model associated with Thomson is the

a)

plum pudding model

b)

nuclear mode.

c)

planetary model

d)

the electron cloud model

120.

In what location did Rutherford suggest the electrons were located?

a)

in the nucleus.

b)

outside the nucleus.

c)

only where the alpha particles were deflected.

d)

outside the atom after they collided with the alpha particle.

121.

What is the electrical charge of the anode?

a)

positive

b)

negative

c)

neutral

d)

unknown

122.

Rutherford used what type of radiation to bombard the gold foil?

a)

alpha particles.

b)

beta particles.

c)

gamma radiation.

d)

neutrinos.

Similar Resources on Wayground

Exam I: CHMY 141 Spring 2020

119 questions

Exam I: CHMY 141 Spring 2020

quiz

Worksheet

•

10th Grade - University

Chemistry Final Review

117 questions

Chemistry Final Review

quiz

Worksheet

•

10th - 12th Grade

18.1.3 Potential Energy Diagram

124 questions

18.1.3 Potential Energy Diagram

quiz

Worksheet

•

10th Grade - University

Unit 6 Homework: Ionic Formulas and Naming Compounds

117 questions

Unit 6 Homework: Ionic Formulas and Naming Compounds

quiz

Worksheet

•

11th Grade

Chem 1 Fall Semester NHS

125 questions

Chem 1 Fall Semester NHS

quiz

Worksheet

•

9th - 12th Grade

U7 Chemical Reactions Retake Assignment

121 questions

U7 Chemical Reactions Retake Assignment

quiz

Worksheet

•

12th Grade

Chemistry Honors Sem 1 Final Exam review

124 questions

Chemistry Honors Sem 1 Final Exam review

quiz

Worksheet

•

10th Grade

Atoms And Molecules _LS_ 2_2

122 questions

Atoms And Molecules _LS_ 2_2

quiz

Worksheet

•

9th Grade