Wayground logo

Free Printable Worksheets

Font size

S
M
L
XL
Worksheets

Unit 4: Atoms

Total questions: 65

Worksheet time: 3hrs 12mins

Name
Class
Date
1.

The atom is...

a)

The basic building block of matter

b)

Unimportant

c)

Important in creating protons

d)

I don't know

2.

What are atoms composed of?

a)

Mass, oxygen, matter

b)

Protons, neutrons, electrons

c)

Protons, mass, nuclei

d)

Electrons, matter, neutrons

3.

_____ orbit the atomic nucleus.

a)

Protons

b)

Matter

c)

Electrons

d)

Atoms

4.

Protons have ____ charge.

a)

no

b)

a negative

c)

a neutral

d)

a positive

5.

Electrons have ____ charge.

a)

no

b)

a negative

c)

a positive

d)

a neutral

6.

What does the atomic number equal?

a)

The number of electrons

b)

The number of protons

c)

The number of neutrons

d)

The number of atoms.

7.

An atomic model is NOT a reliable representation of an atom.

a)

False

b)

True

8.

What is the nature of an element determined by?

a)

The number of electrons

b)

The number of neutrons

c)

Nothing

d)

The number of protons

9.

What is the atomic number of this element?

a)

6

b)

12.011

c)

C

d)

None of the above

10.

What is the atomic mass the sum of?

a)

Only protons

b)

Only electrons

c)

Protons and electrons

d)

Protons and neutrons

11.

How many neutrons are in Neon

a)

20

b)

10

c)

30

12.

Cobalt has 27 protons, 32 neutrons, and 27 electrons. What is the atomic number?

a)

32

b)

59

c)

27

d)

5

13.
This model this model was the first to show a nucleus, consisting of protons and neutron.  Electrons surround the nucleus but are not shown in distinct energy levels. 
a)
The "Rutherford Model" of the atom
b)
The "Plum Pudding Model" of the atom
c)
The "Quantum Mechanical Modell" of the atom
d)
Democritus's model of the atom
14.
This was the first model of the atom ever proposed. It was simple and described atoms as tiny spheres that could not be broken down into smaller pieces.
a)
Democritus's model of the atom
b)
The "Plum Pudding Model" of the atom
c)
The "Rutherford Model" of the atom
d)
The "Quantum Mechanical Model" of the atom
15.
This is the most complete and current model of the atom. It consists of 61 elementary particles. Electrons are located in complex orbitals.
a)
The "Quantum Mechanical Model" of the atom
b)
The "Rutherford Model" of the atom
c)
The "Plum Pudding Model" of the atom
d)
The "Bohr Model" of the atom
16.
This model added on to previous models by showing electrons existed at certain "energy levels". However it does not accurately show what those levels look like.
a)
The "Bohr Model" of the atom
b)
The "Rutherford Model" of the atom
c)
The "Plumb Pudding Model" of the atom
d)
The "Quantum Mechanical Model" of the atom
17.
This model was developed after J.J. Thompson discovered electrons, a particle smaller than an atom. Is shows electrons floating freely in a positive space.
a)
The "Plum Pudding Model" of the atom
b)
The "Rutherford Model" of the atom
c)
Democritus's model of the atom
d)
The "Quantum Mechanical Model" of the atom
18.
Ernest Rutherford discovered that atoms were mostly _________________. 
a)
negatively charged
b)
positively charged
c)
electrons
d)
empty space. 
19.
What does the nucleus of an atom contain?
a)
Electrons & Neutrons
b)
Protons & Neutrons
c)
Neutrinos & Positrons
20.
What can you conclude from the fact that scientists continue to update the atomic model?
a)
New information about atoms continues to be discovered
b)
Old information about atoms is completely useless
c)
Scientists did not have any information about atoms until a few years ago
d)
Scientists still have no idea what atoms look like
21.
In the gold foil experiment, most of the positively charged alpha particles passed through the gold foil, but some were deflected or bounced back.  What did we conclude because of this?  
a)
Atoms are small indivisible spheres
b)
Atoms are mostly empty space with a small, dense, positive center
c)
Atoms have negatively charged particles which orbit the nucleus
d)
Light is a wave, not a particle
22.
Discovered the electron using cathode ray tube
a)
Joseph Thomson
b)
John Dalton
c)
Ernest Rutherford
d)
Robert Millikan
23.
His atomic model included a dense positive core in an atom, surrounded by negatively charged particles
a)
Joseph Thomson
b)
Niels Bohr
c)
Ernest Rutherford
24.
Atomic model was termed the "plum pudding model"
a)
Joseph Thomson
b)
Niels Bohr
c)
Ernest Rutherford
25.
Idea was of an indivisible particle of matter he called "atomos"
a)
John Dalton
b)
Aristotle
c)
Democritus
d)
Plato
26.
What scientist is best known for his gold foil experiment?
a)
J.J. Tomson
b)
Ernest Rutherford
c)
John Dalton
d)
Democritus
27.

Place the following atomic models in order, from earliest to latest:


A) Rutherford B) Thomson C) Dalton

a)

B, C, A

b)

C, A, B

c)

A, C, B

d)

C, B, A

28.

Which scientists believed an atom was indivisible? (Choose all correct responses.)

a)

Democritus

b)

Dalton

c)

Thomson

d)

Rutherford

29.

Which scientist believed that elements differed from one another because their atoms had different mass?

a)

Democritus

b)

Dalton

c)

Thomson

d)

Rutherford

30.

Dalton developed the first scientifically tested atomic theory.

a)

True

b)

False

31.

Chadwick found the nucleus through the gold foil experiment.

a)

True

b)

False

32.

Aristotle and other early Greek philosophers thought that matter was composed of four elements: air, earth, fire, and water.

a)

True

b)

False

33.

Cathode rays contain a negative charge.

a)

True

b)

False

34.

Which scientist measured the charge on an electron as 1.602 x 10-19 Coulombs?

a)

Democritus

b)

Millikan

c)

Rutherford

d)

Bohr

35.

Researchers discovered a subatomic particle while working with the cathode ray tube. The particle is known as a(n) ____________________.

a)

proton

b)

neutron

c)

electron

36.

A ____________________ is a subatomic particle that has mass nearly equal to that of a proton, but it carries no electrical charge.

a)

proton

b)

neutron

c)

electron

37.

An alpha particle is _____________________ charged with two protons and neutrons.

a)

positively

b)

negatively

c)

neutrally

38.

James Chadwick showed that the nucleus also contained a neutral subatomic particle known as the ____________________.

a)

proton

b)

neutron

c)

electron

39.

What were the main flaws in Dalton’s atomic theory? (choose all that apply)

a)

All elements are composed of tiny indivisible particles called atoms that cannot be broken down further.

b)

Atoms of different elements differ in their physical and chemical properties.

c)

All atoms of a given element are identical.

d)

In chemical reactions, atoms are combined, separated or rearranged, but not created nor destroyed.

e)

Atoms of different elements combine in simple, whole number ratios to form compounds.

40.

How many neutrons are in an atom of carbon-14?

a)

6

b)

8

c)

10

d)

14

41.

How many protons does this isotope of titanium have?

a)

22

b)

26

c)

48

d)

70

42.

How many electrons are in an atom that has an atomic number of 34, an atomic mass of 74 and a charge of -2?

a)

2

b)

34

c)

36

d)

40

43.

Write the hyphen notation for the isotope that has 39 protons and 50 neutrons.

a)

Yttrium-11

b)

Tin-39

c)

Tin-89

d)

Yttrium-89

44.

Chromium has four naturally occurring isotopes (chromium-50, chromium-52, chromium-53, and chromium-54). What is the average atomic mass of Chromium?

a)

4

b)

51.996

c)

52.25

d)

Not enough information was given.

45.

An element has three isotopes. Given the abundances and relative masses, calculate the average atomic mass and determine (from the periodic table) which element it is.


Abundances | Relative masses

0.005% | 234.04 amu

0.720% | 235.04 amu

99.275% | 238.05 amu

a)

Uranium (#92, Atomic Mass: 238.03 amu)

b)

Fluorine (#9, Atomic Mass: 19.00 amu)

c)

Mercury (#89, Atomic Mass: 200.59 amu)

d)

Polonium (#84 209 amu)

46.
Four isotopes of lead include lead-204, lead-206, lead-207, and lead-208.  The average atomic mass of lead is 207.2.  Which isotope of lead is likely to be the most abundant.
a)
204
b)
206
c)
207
d)
208
47.

Why are ions formed?

a)

To make our lives difficult

b)

Because atoms want to be stable

c)

Because atoms have the same number of protons and electrons

d)

Because atoms gained neutrons

48.
What is the charge of an atom that has lost one electron?
a)
-1
b)
-2
c)
+1
d)
+2
49.
What is the atomic mass of Copper?
a)
63
b)
29
c)
34
d)
92
50.

How many neutrons are in a Gold atom?

a)

79

b)

196

c)

117

d)

275

51.

An atom with 10 protons, 8 neutrons, 8 electrons is a _______. (Choose all that apply)

a)

cation

b)

anion

c)

neutral atom

d)

ion

52.

A negatively charged ion that has gained electrons to satisfy the octet rule

a)

Anion

b)

Cation

c)

Neutral Atom

d)

Isotope

53.

Atoms of the same element that have different mass than expected because they have a different number of neutrons.

a)

Neutral Atom

b)

Ion

c)

Isotope

d)

Cation

54.

If an ion has a negative charge you would __________ the charge number to the number of protons to figure out how many electrons there are.

a)

Add

b)

Subtract

c)

Divide

d)

Multiply

55.

How many protons, neutrons, and electrons?

a)

proton = 6, neutron = 4, electron = 1

b)

proton = 4, neutron = 4, electron = 5

c)

proton = 1, neutron = 6, electron = 10

d)

proton = 4, neutron = 2, electron = 3

56.

How many protons, neutrons, and electrons?

a)

proton = 16, neutron = 8, electron = 10

b)

proton = 8, neutron = 16, electron = 8

c)

proton = 8, neutron = 8, electron = 10

d)

proton = 6, neutron = 2, electron = 6

57.

What is a representation of an ion?

a)

Li

b)

Na-22

c)

O-2

58.

What type of atom is this?

a)

Neutral atom

b)

Cation

c)

Anion

d)

Isotope

59.

An atom with the same number of protons and electrons (no charge) and the expected atomic mass or number of neutrons from the periodic table.

a)

Neutral/Normal Atom

b)

Ion

c)

Isotope

60.
Can an atom of Hydrogen have 2 protons?
a)
Yes, because it can be an ion
b)
No, because protons identify the atom
c)
Yes, because it can be an isotope
d)
No, because only neutral atoms exist
61.
Can an atom of Helium have 3 electrons?
a)
Yes, because it can be an ion
b)
No, because protons identify the atom
c)
Yes, because it can be an isotope
d)
No, because only neutral atoms exist
62.
Can an atom of Helium have 3 neutrons?
a)
Yes, because it can be an ion
b)
No, because protons identify the atom
c)
Yes, because it can be an isotope
d)
No, because only neutral atoms exist
63.

The atomic mass of an element is the ___.

a)

average of the mass number and the atomic number for the element

b)

weighted average of the masses of the isotopes of the element

c)

total mass of the isotopes of the element

d)

total number of subatomic particles in the nucleus

64.
Compute the average atomic mass for silicon:
a)
27.977
b)
28.09
c)
28.976
d)
The average mass cannot be determined from provided information.
65.
An element has two naturally occurring isotopes. One is 10.013 amu and is 19.9% abundant. The other is 11.01 amu and is 80.1% abundant. What is the average atomic mass? What element is it?
a)
9.012, Beryllium
b)
12.011, Carbon
c)
6.941, Lithium
d)
10.812, Boron

Similar Resources on Wayground

Earth Science Test Review

70 questions

Earth Science Test Review

quiz

Worksheet

•

6th Grade - University

GRADE 9 FIRST SEMESTER SCIENCE FINAL EXAM REVISION TEST

68 questions

GRADE 9 FIRST SEMESTER SCIENCE FINAL EXAM REVISION TEST

quiz

Worksheet

•

9th Grade

ATMOSPHERE TEST BY POPS

65 questions

ATMOSPHERE TEST BY POPS

quiz

Worksheet

•

11th Grade

The Origin and Structure of the Earth

60 questions

The Origin and Structure of the Earth

quiz

Worksheet

•

11th Grade

Révision examen Module 2

65 questions

Révision examen Module 2

quiz

Worksheet

•

9th Grade

The Nervous system

62 questions

The Nervous system

quiz

Worksheet

•

8th - 10th Grade

Electricity

64 questions

Electricity

quiz

Worksheet

•

9th Grade

Geology Review

70 questions

Geology Review

quiz

Worksheet

•

11th Grade