wayground logo

Free Printable Worksheets

Font size

S
M
L
XL
Worksheets

Structure of Atoms

Total questions: 50

Worksheet time: 31mins

Name
Class
Date
1.

What is the electrical charge of a proton?

a)

positive

b)

negative

c)

neutral

d)

all of the above

2.

What is the electrical charge of a neutron?

a)

positive

b)

negative

c)

netural

d)

all of the above

3.

What is the electrical charge of an electron?

a)

positive

b)

negative

c)

neutral

d)

all of the above

4.

Where is the proton located?

a)

nucleus

b)

energy shells

c)

electron cloud

d)

the outside of an atom

5.

Where is the neutron located?

a)

nucleus

b)

energy shells

c)

electron cloud

d)

the outside of an atom

6.

Where is the electron located?

a)

orbital

b)

nucleus

c)

in the inside of the atom

d)

matter

7.

What is the mass of a proton?

a)

0 amu

b)

1 amu

c)

1.5 amu

d)

2 amu

8.

What is the mass of a neutron?

a)

0 amu

b)

1 amu

c)

1.5 amu

d)

2 amu

9.

What is the mass of an electron?

a)

0 amu

b)

1 amu

c)

1.5 amu

d)

2 amu

10.

True or False: The nucleus contains the mass of an atom.

a)

True

b)

False

c)

Maybe

11.

True or False: The electron cloud is the lightest part of an atom because it is made up mostly of empty space.

a)

True

b)

False

c)

Maybe

12.

Which of the following are found in the nucleus? Check all that apply.

a)

proton

b)

electron

c)

neutron

d)

all of the above

13.
a)
Neutrons = Mass Number + Atomic Number
b)
Neutrons = Mass Number - Atomic Number
c)
Neutrons = Atomic Number + Electrons
d)
Neutrons = Atomic Number - Electrons
14.
a)
Mass Number = Atomic Number + Neutrons
b)
Mass Number = Atomic Number - Neutrons
c)
Mass Number = Atomic Number + Electrons
d)
Mass Number = Atomic Number - Electrons 
15.
a)
Electrons that are inside the nucleus
b)
Electrons on the outermost energy level 
c)
Electrons that are closest to the nucleus
d)
Electrons that have a positive charge
16.
a)
Number of protons
b)
Number of neutrons
c)
Number of electrons
d)
Mass Number
17.
a)
Protons and Neutrons
b)
Protons and Electrons
c)
Neutrons and Electrons
d)
Neutrons and Valence Electrons
18.
a)
The number of protons
b)
The number of neutrons
c)
The Mass Number
d)
The number of valence electrons
19.
a)
It contains protons
b)
It contains neutrons
c)
It contains electrons
20.

What is the small central core of an atom called?

a)

Nucleus

b)

Orbital

c)

Core

d)

Electron

21.

A(n) is the building block of matter.

a)

nucleus

b)

atom

c)

proton

d)

electron

22.

A subatomic particle that has a positive charge is known as a(n)

a)

electron

b)

neutron

c)

proton

d)

isotope

23.

Isotopes are atoms of the same element with the same number of protons and

a)

a different number of electrons.

b)

a different number of molecules.

c)

a different number of neutrons.

d)

the same number of neutrons.

24.

How many neutrons does an atom of hydrogen contain?

a)

3

b)

1

c)

0

d)

2

25.

Objects that are electrically neutral become when they lose electrons.

a)

positive

b)

negative

c)

neutral

d)

doubly charged

26.

What did J.J. Thomson's experiment show?

a)

The atom is like a uniform sphere.

b)

Cathode rays are made up of electrons.

c)

All atoms undergo radioactive decay.

d)

Isotopes undergo radioactive decay.

27.

What is the MOST important subatomic particle when it comes to identifying the name of an atom?

a)

Electron

b)

Proton

c)

Nucleus

d)

Neutron

28.

The atomic number of sodium is 11 and its mass number is 23. It has

a)

11 neutrons and 12 protons

b)

12 protons and 11 electrons

c)

11 electrons and 12 neutrons

d)

12 electrons and 11 neutrons

29.

The electrons present in the outermost shell are called

a)

Valency electrons

b)

Octet electrons

c)

Duplet electrons

d)

Valence electrons

30.
an atom with atomic number 6 would have how many protons 
a)
6
b)
12
c)
3
d)
cannot be determined 
31.
all matter is made of what 
a)
energy 
b)
atoms 
c)
electrons 
d)
compounds 
32.
How many electrons are in the element oxygen?
a)
7
b)
10
c)
8
d)
9
33.
"C" is the element symbol for which element?
a)
calcium
b)
carbon
c)
chlorine
d)
cadmium
34.
What is the atomic number for an element with three protons?
a)
2
b)
1
c)
3
d)
6
35.
Most of the mass in an atom is concentrated in the...
a)
electrons
b)
nucleus
c)
protons
d)
empty space
36.
Which particle has a similar mass to a proton?
a)
Electron
b)
Neutron
c)
Photon
d)
Marble
37.

How many neutron are in the atom "K"?

a)

7

b)

2

c)

39

d)

20

38.
What is the atomic mass of "F"
a)
9
b)
18
c)
17
d)
19
39.

Dalton’s atomic theory successfully proved

a)

Rutherford correct there is a nucleus

b)

Thomson correct regarding electrons with a negative charge

c)

Rutherford correct regarding protons with a positive charge

d)

Democritus correct regarding all matter made of atoms

40.

Which of the following statements about Rutherford’s model of atom are correct?

a)

The nucleus is positively charged by protons

b)

The nucleus is neutral from protons

c)

The nucleus is negatively charged by electrons

d)

There is no nucleus

41.

The ion of an element has 3 positive charges. Mass number of the atom is 27 and the number of neutrons is 14. What is the number of electrons in the ion?

a)

13

b)

10

c)

14

d)

16

42.

The isotopes of a same element have:

a)

same mass number.

b)

same atomic number.

c)

different mass number.

d)

both b & c.

43.

What is the atomic mass of Neon?

a)

10

b)

20.18

c)

10.18

d)

9.82

44.
How many protons are in Beryllium?
a)
4
b)
9
c)
5
d)
2
45.
How many neutrons are in a Gold atom?
a)
79
b)
196
c)
118
d)
275
46.
The scientist responsible for "discovering" the nucleus is:
a)
Bohr
b)
Rutherford
c)
Schroedinger
d)
Einstein
47.
How did Rutherford discover the proton?
a)
Cathode tube ray experiment
b)
Gold Foil Experiment
c)
Planetary Model
d)
Plum Pudding Model
48.
What did Thomson discover?
a)
electron
b)
proton
c)
neutron
d)
electron cloud
49.

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

a)

Democritis

b)

Dalton

c)

Moseley

d)

Einstein

50.

99.9% of the atom's mass is found where?

a)

nucleus

b)

protons

c)

electron cloud

d)

neutrons

Similar Resources on Wayground

Periodic Table - full unit

50 questions

Periodic Table - full unit

quiz

Worksheet

•

9th - 12th Grade

Test #2 Review

48 questions

Test #2 Review

quiz

Worksheet

•

9th Grade

Properties of Matter

45 questions

Properties of Matter

quiz

Worksheet

•

8th - 10th Grade

RC 1 Review

49 questions

RC 1 Review

quiz

Worksheet

•

9th Grade

Chemistry Unit Test Review

50 questions

Chemistry Unit Test Review

quiz

Worksheet

•

6th - 11th Grade

Kelly - Astronomy Review

45 questions

Kelly - Astronomy Review

quiz

Worksheet

•

9th - 12th Grade

Environmental Final Exam Review

50 questions

Environmental Final Exam Review

quiz

Worksheet

•

9th - 10th Grade

Biology Summary Review

50 questions

Biology Summary Review

quiz

Worksheet

•

9th Grade