wayground logo

Free Printable Worksheets

Font size

S
M
L
XL
Worksheets

Lewis Dot Structures, Atomic Structure, Counting Atoms

Total questions: 70

Worksheet time: 5hrs 1mins

Name
Class
Date
1.

What elements are represented in this chemical formula? Fe2O3Fe_2O_3  

a)

Iron, Oxygen

b)

Francium, Europium, Oxygen

c)

Ferrium, Oxygen

d)

Berylium, Oxygen

2.

What is the total number of atoms in this formula? H2O2H_2O_2  

a)

2

b)

4

c)

3

3.

What is the total number of atoms in this chemical formula? C8H3NaBr12C_8H_3NaBr_{12}  

a)

18

b)

12

c)

25

d)

24

4.

How many elements are in this chemical formula? NaHCO3NaHCO_3  

a)

1

b)

2

c)

3

d)

4

5.
A subscript is the small number below a(n) ________ that tells the number of _______ of that element.
a)
element symbol; atoms
b)
atom; element symbol
c)
subscript; protons
d)
compound; elements
6.
How many Hydrogen are in 4H2O?
a)
6
b)
8
c)
2
d)
4
7.
How many Oxygen are in H2O?
a)
1
b)
2
c)
0
d)
4
8.
How many Chlorine are in MgCl2?
a)
2
b)
1
c)
3
9.

What does the 6 represent?

a)

Atomic mass

b)

Atomic number

c)

Isotope

d)

Atomic Symbol

10.

Electrons located on the outermost shell are called _________ electrons

a)

Hybrid

b)

Atomic

c)

Neutral

d)

Valence

11.

The valence shell corresponds to this grouping on the periodic table?

a)

The Groups

b)

The Periods

c)

Ionic compounds

d)

Molecular compounds

12.

How many valence electrons do MOST atoms need to be stable?

a)

123

b)

8

c)

as many as there are protons

13.

How many electrons does an uncharged (neutral) atom of neon have?

a)

9

b)

10

c)

8

d)

11

14.

True or False: Neutrons have a negative charge.

a)

True

b)

False

15.

What is an isotope?

a)

Two atoms of the same element with different numbers of protons

b)

A charged atom

c)

A neutral atom

d)

Two atoms of the same element with different numbers of neutrons

16.

How many neutrons does this isotope of lithium have?

a)

3

b)

4

c)

8

d)

5

17.

If you have a Carbon-12 isotope, what does the 12 represent in it?

a)

Proton Number

b)

Atomic number

c)

Mass number

d)

Number of neutrons

18.

Particles in an atom that are have no charge are

a)

Protons

b)

Electrons

c)

Neutrons

d)

Negatrons

19.

What is the atomic number for an element with 3 protons?

a)

2

b)

3

c)

6

d)

1

20.

What quantities vary between isotopes of an element?

a)

Neutrons and mass number

b)

Neutrons and electrons

c)

Protons, electrons, and atomic number

d)

Protons, electrons, and atomic mass

21.

A neutral atom with atomic number 6 would have how many electrons?

a)

3

b)

6

c)

1

d)

2

22.

The positive particles of an atom are

a)

Protons

b)

Electrons

c)

Positrons

d)

Neutrons

23.

Which two components of an atom contribute to the mass?

a)

Neutrons and electrons

b)

Protons and neutrons

c)

Protons and electrons

24.

The central region of an atom, where its neutrons and protons are found, is called the

a)

Nucleus

b)

Center

c)

Electron cloud

d)

Core

25.

What is the Period Number of sulfur?

a)

1

b)

3

c)

2

d)

4

26.

What is the mass number for iron?

a)

26

b)

55

c)

55.847

d)

56

27.

What is the charge of an electron?

a)

Positive

b)

Negative

c)

Neutral

d)

Variable

28.

Which element has an atomic number of 1?

a)

Helium

b)

Hydrogen

c)

Oxygen

d)

Carbon

29.

What is the term for the number of protons in an atom's nucleus?

a)

Mass number

b)

Isotope number

c)

Atomic number

d)

Atomic mass

30.

Which subatomic particle(s) will be located in the nucleus?

a)

Electrons

b)

Electrons and Protons

c)

Protons and Neutrons

d)

Neutrons and Electrons

31.

Which subatomic particle(s) will be located in the cloud?

a)

Electrons

b)

Electrons and Protons

c)

Protons and Neutrons

d)

Neutrons and Electrons

32.

What number represents an element's identity? (How do we know what element it is?)

a)

Atomic Smell

b)

Atomic Number

c)

Atomic Mass

d)

Atomic Temperature

33.

How many protons are in the isotope pictured above?

a)

29

b)

34

c)

63

d)

92

34.
The first energy level can hold up to how many electrons?
a)
8
b)
4
c)
2
d)
5
35.

which elements have 4 valence electrons?

a)

group 3

b)

group 5 or 15

c)

group 14 or 4

36.

groups on the periodic table tell you

a)

the number of energy levels (rings)

b)

the number of protons

c)

the elements identity

d)

the number of valence electrons

37.

periods on the periodic table tell you

a)

the number of valence electrons

b)

the number of protons

c)

the number of energy levels

d)

the total number of subatomic particles in the element

38.

Ne, neon, is in which family or group?

a)

alkali metals

b)

alkaline earth metals

c)

transition metals

d)

halogens

e)

noble gases

39.

Br, bromine, is in which family or group?

a)

alkali metals

b)

alkaline earth metals

c)

transition metals

d)

halogens

e)

noble gases

40.

What group and period does this element belong in? *

a)

period 1 and group 3

b)

period 3 and group 1

c)

period 2 and group 3

d)

period 3 and group 2

41.
What is the atomic number of this atom?
a)
2
b)
4
c)
6
d)
none of the above
42.

What is the mass number of this atom?

a)

1

b)

3

c)

4

d)

7

43.
Isotopes are elements with a different amount of
a)
protons
b)
neutrons
c)
electrons
d)
atoms
44.
This is a correct dot diagram for fluorine (F)
a)
true
b)
false
45.
According to the octet rule most elements need _______ valence electrons.
a)
2
b)
8
c)
6
d)
18
46.
How many electrons should Lithium have around its Lewis dot model?
a)
1
b)
2
c)
3
d)
4
47.
How many electrons should Beryllium have around its Lewis dot model?
a)
1
b)
2
c)
3
d)
4
48.
How many electrons should Boron have around its Lewis dot model?
a)
1
b)
3
c)
5
d)
7
49.
How many electrons should Carbon have around its Lewis dot model?
a)
1
b)
3
c)
4
d)
5
50.
How many electrons should Nitrogen have around its Lewis dot model?
a)
1
b)
3
c)
4
d)
5
51.
How many electrons should Oxygen have around its Lewis dot model?
a)
5
b)
6
c)
7
d)
8
52.
How many electrons should Flourine have around its Lewis dot model?
a)
5
b)
6
c)
7
d)
8
53.
How many electrons should Neon have around its Lewis dot model?
a)
5
b)
6
c)
7
d)
8
54.

How many valence electrons does Magnesium Have?

a)

1 Valence electron

b)

2 Valence electron

c)

3 Valence electron

d)

4 Valence electron

e)

5 Valence electron

55.

How many valence electrons does Aluminum Have?

a)

1 Valence electron

b)

2 Valence electron

c)

3 Valence electron

d)

4 Valence electron

e)

5 Valence electron

56.

How many valence electrons does Potassium Have?

a)

1 Valence electron

b)

2 Valence electron

c)

3 Valence electron

d)

4 Valence electron

e)

5 Valence electron

57.

How many valence electrons does Phosphorus Have?

a)

1 Valence electron

b)

2 Valence electron

c)

3 Valence electron

d)

4 Valence electron

e)

5 Valence electron

58.

How many valence electrons does Silicon Have?

a)

1 Valence electron

b)

2 Valence electron

c)

3 Valence electron

d)

4 Valence electron

e)

5 Valence electron

59.
An element with five valence electrons is
a)
phosphorus
b)
oxygen
c)
beryllium
d)
rubidium
60.

This is a correct dot diagram for oxygen (O)?

a)

true

b)

false

61.

What element does this Lewis Dot Digram represent?

a)

Li

b)

Al

c)

C

d)

Be

62.

Which Lewis Dot Diagram would represent Chlorine?

a)
b)
c)
d)
63.

This could be the dot diagram of

a)

Si

b)

Br

c)

B

d)

S

64.

This is a correct dot diagram for neon (Ne)

a)

true

b)

false

65.
This is the correct dot diagram for nitrogen, group 15.
a)
true
b)
false
66.

How would you draw a Lewis dot diagram for Magnesium?

a)
b)
c)
d)
67.

Which of the following shows a correct Lewis dot structure?

a)
b)
c)
d)
68.
This is the correct dot diagram for sodium (Na)
a)
true
b)
false
69.

Which of these is correct?

a)
b)
c)
70.

What is the goal of the Lewis Dot Structure?

a)

To determine the electron position.

b)

To show the element's valence electrons & bonding capabilities.

c)

To find the atomic mass of an element.

d)

To search for the number of electrons in an individual atom.

Similar Resources on Wayground

U4 AP Biology Cell communication & cycle

72 questions

U4 AP Biology Cell communication & cycle

quiz

Worksheet

•

9th - 12th Grade

Year 9 Science Sem 2 Revision

71 questions

Year 9 Science Sem 2 Revision

quiz

Worksheet

•

9th Grade

BIO181 Unit 2 Review:Cell Biology & Membrane Transport Worksheet

70 questions

BIO181 Unit 2 Review:Cell Biology & Membrane Transport Worksheet

quiz

Worksheet

•

9th Grade

2nd Qualifying Level - The Great Minds

70 questions

2nd Qualifying Level - The Great Minds

quiz

Worksheet

•

7th - 9th Grade

AQA Trilogy Chemistry Paper 1 Basics

69 questions

AQA Trilogy Chemistry Paper 1 Basics

quiz

Worksheet

•

9th - 11th Grade

Biology Midterm (Fall final) Practice

68 questions

Biology Midterm (Fall final) Practice

quiz

Worksheet

•

9th Grade

Forces and Motion

75 questions

Forces and Motion

quiz

Worksheet

•

9th Grade

Noncontact Forces Review

74 questions

Noncontact Forces Review

quiz

Worksheet

•

7th - 9th Grade