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Ch. 4-1: Lewis & Bohr Structures - Printable Science Worksheets class 8 - Wayground

Ch. 4-1: Lewis & Bohr Structures

Stacey Glanz

By Stacey Glanz

20 questions

8th - 8th Grade

Science

210 plays

Updated Oct 2026

Ch. 4-1: Lewis & Bohr Structures is a Grade 8 science worksheet that builds understanding of how electrons are arranged in energy levels and how valence electrons influence atomic models. Students answer 20 questions—19 multiple-choice items and one multiple-select item—about valence electrons, electron shells, the octet rule, noble gases, and identifying elements from electron information. The worksheet also asks students to interpret Lewis dot structures and Bohr models, including selecting the correct number of valence electrons for elements such as carbon, fluorine, iodine, and oxygen. It reinforces the difference between a Lewis dot structure, which shows an element symbol and its outermost electron shell, and a Bohr model, which represents the atom more completely. This free printable worksheet includes a complete answer key for checking student understanding.

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Ch. 4-1: Lewis & Bohr Structures

Total questions: 20

Name
Class
Date
1.
How are electrons arranged in an atom?
a)
In groups of five
b)
In energy levels
c)
By color
d)
By shape
2.

An element with five valence electrons is

a)

phosphorus

b)

oxygen

c)

beryllium

d)

rubidium

3.
What is the name of the group that never reacts--ever ever they are stable with a full outermost ring!!!
a)
noble gases
b)
transition
c)
halogens
d)
borons
4.
What's a valence electron?
What's a valence electron?
a)
electrons in the second energy level
b)
electrons in the outermost energy level
c)
the atomic number
d)
electrons in the first level
5.

How many valence electrons does Iodine Have?

a)

6

b)

16

c)

7

d)

17

6.
How many electrons should Flourine have around its Lewis dot model?
a)
5
b)
6
c)
7
d)
8
7.
How many electrons should Carbon have around its Lewis dot model?
a)
1
b)
3
c)
4
d)
5
8.
?
?
a)
Helium
b)
Hydrogen
c)
Argon
d)
Silver
9.
How many electrons does potassium K contain? (click to see image)
How many electrons does potassium K contain? (click to see image)
a)
19
b)
39
c)
20
d)
40
10.

Electrons exist in something called __________.

a)

nucleus

b)

orbits

c)

Shells or Energy levels

d)

Valences

11.

What is a Lewis Dot Structure?

a)

It shows all of the particles in the atom.

b)

Contains protons and neutrons

c)

Only shows the element symbol and it's outer most electron shell

d)

Contains protons and electrons

12.

What is a drawing of an atom that shows all of the particles?

a)

Lewis Dot Model

b)

Dalton Model

c)

Thompson Model

d)

Bohr Model

13.

According to the octet rule most elements need _______ valence electrons.

a)

2

b)

8

c)

6

d)

18

14.
What element is represented in this Bohr Model?

What element is represented in this Bohr Model?

a)

Carbon

b)

Hydrogen

c)

Aluminum

d)

Lithium

15.
Which is the correct Lewis Dot Structure for Oxygen?

Which is the correct Lewis Dot Structure for Oxygen?

a)
Which is the correct Lewis Dot Structure for Oxygen?
b)
Which is the correct Lewis Dot Structure for Oxygen?
c)
Which is the correct Lewis Dot Structure for Oxygen?
d)
Which is the correct Lewis Dot Structure for Oxygen?
16.

Select all that apply to the octet rule.

a)

Maximum of 2 electrons on 1st shell

b)

Maximum of 18 electrons on 2nd shell

c)

Maximum of 8 electrons on 2nd shell

d)

Maximum of 8 electrons on 3rd shell

17.
This is the correct dot diagram for nitrogen (N)
This is the correct dot diagram for nitrogen (N)
a)
true
b)
false
18.
This could be the dot diagram of
This could be the dot diagram of
a)
Mg
b)
Cl
c)
C
d)
O
19.
This could be the dot diagram of
This could be the dot diagram of
a)
O
b)
B
c)
Li
d)
Ne
20.
This could be the dot diagram of
This could be the dot diagram of 
a)
Ne
b)
Si
c)
Al
d)
Be
WaygroundAnswer Key

Ch. 4-1: Lewis & Bohr Structures

Total questions: 20

1.
b) In energy levels
2.
a)

phosphorus

3.
a) noble gases
4.
b) electrons in the outermost energy level
5.
c)

7

6.
c) 7
7.
c) 4
8.
c) Argon
9.
a) 19
10.
c)

Shells or Energy levels

11.
c)

Only shows the element symbol and it's outer most electron shell

12.
d)

Bohr Model

13.
b)

8

14.
d)

Lithium

15.
a)
16.
d)

Maximum of 8 electrons on 3rd shell

, c)

Maximum of 8 electrons on 2nd shell

, a)

Maximum of 2 electrons on 1st shell

17.
b) false
18.
d) O
19.
b) B
20.
b) Si

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FAQs

What does the Ch. 4-1: Lewis & Bohr Structures worksheet cover?

This Grade 8 science worksheet uses 19 multiple-choice questions and one multiple-select question to assess electron energy levels, valence electrons, the octet rule, and noble gases. Students also interpret Lewis dot structures and Bohr models, determine valence-electron counts for named elements, and identify elements from atomic models.

How can I use this worksheet to teach Lewis and Bohr structures?

Introduce electron shells and valence electrons before assigning the questions, then model how to count an element’s outermost electrons and represent them in a Lewis dot structure. Use the items comparing Lewis dot structures with Bohr models for a class discussion about what each model shows, and have students explain why elements such as oxygen, fluorine, and carbon receive different numbers of dots.

What mistakes should I watch for when students complete this Lewis and Bohr structures worksheet?

Watch for students confusing total electrons with valence electrons, especially when answering the iodine, fluorine, carbon, and potassium items. Students may also select a Lewis dot structure when the question asks for a Bohr model, or assume that the Lewis model shows every particle rather than the element symbol and outermost electron shell.

How do I assign and grade this Lewis and Bohr structures worksheet?

The worksheet is available as a printable PDF and as a digital quiz on Wayground, and it includes a complete answer key for all 20 questions. You can grade printable submissions by scanning student work with the Wayground for Teachers app, while the digital quiz can be completed and graded online.

How can I differentiate this Lewis and Bohr structures worksheet for my students?

Use the worksheet’s Advanced Settings to increase font size or adjust font spacing so the model images, answer choices, and electron-structure questions are easier to read. You can also apply a dyslexia-friendly font or translate the worksheet into another language while students work with the Lewis dot and Bohr model items.

Where can I find more free worksheets like this on Wayground?

Wayground offers a comprehensive collection of free printable worksheets and practice problems across subjects, with downloadable PDFs and answer keys to help students master essential skills and concepts. Browse more resources at https://wayground.com/en-us/worksheets.

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