Lewis Electron Dot Structures - Questions

The Lewis Electron Dot Structures Concept Builder is comprised of 48 questions. The questions are divided into 18 different Question Groups and spread across three different activities. Questions in the same group are rather similar to one another. The Concept Builder is coded to select at random a question from each group until a student is successful with that group of questions.

There are three activities in the Concept Builder. Those three activities are differentiated as follows:
 

• Valence Electrons: Question Groups 1-6 ... Determine the number of valence electrons in various molecules if given the formula.
• Master Configurator: Question Groups 7-12 ... Identify correct and incorrect Lewis Structures for neutral compounds.
• Electron Dot Wizard: Question Groups 13-18 ... Identify correct and incorrect Lewis Structures for neutral compounds and polyatomic ions.

The questions from each group are shown below. Teachers are encouraged to view the questions in order to judge which difficulty levels are most appropriate for their classes. We recommend providing students two or more options. 

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Questions

 
Activity 1 – Counting Valence Electrons
Question Group 1
Question 1
Determine the number of valence electrons (i.e., outer shell electrons) in CS₂.
 
 
Question 2
Determine the number of valence electrons (i.e., outer shell electrons) in CO₂.
 
 
 
Question Group 2
Question 3
Determine the number of valence electrons (i.e., outer shell electrons) in CCl4.
 
 
Question 4
Determine the number of valence electrons (i.e., outer shell electrons) in CF4.
 
 
Question Group 3
Question 5
Determine the number of valence electrons (i.e., outer shell electrons) in O3.
 
 
Question 6
Determine the number of valence electrons (i.e., outer shell electrons) in SO₂.
 
 
Question Group 4
Question 7
Determine the number of valence electrons (i.e., outer shell electrons) in BH3.
 
 
Question 8
Determine the number of valence electrons (i.e., outer shell electrons) in CH4.
 
 
Question Group 5
Question 9
Determine the number of valence electrons (i.e., outer shell electrons) in H₂O.
 
 
Question 10
Determine the number of valence electrons (i.e., outer shell electrons) in H₂S.
 
 
Question Group 6
Question 11
Determine the number of valence electrons (i.e., outer shell electrons) in SF6.
 
 
Question 12
Determine the number of valence electrons (i.e., outer shell electrons) in XeF4.
 
 
 
 
Activity 2 – Master Configurator
Question Group 7
Question 13
Consider the proposed Lewis structures for the stated formulas. Identify those that violate the rules for electron dot structures. Select all that apply.
 

 

 
 
Question 14
Consider the proposed Lewis structures for the stated formulas. Identify those that violate the rules for electron dot structures. Select all that apply.
 

 

 
 
Question 15
Consider the proposed Lewis structures for the stated formulas. Identify those that violate the rules for electron dot structures. Select all that apply.
 

 

 
 
 
 
Question Group 8
Question 16
Consider the proposed Lewis structures for the stated formulas. Identify those that violate the rules for electron dot structures. Select all that apply.
 

 

 
 
Question 17
Consider the proposed Lewis structures for the stated formulas. Identify those that violate the rules for electron dot structures. Select all that apply.
 

 

 
 
Question 18
Consider the proposed Lewis structures for the stated formulas. Identify those that violate the rules for electron dot structures. Select all that apply.
 

 

 
 
 
 
Question Group 9
Question 19
Consider the proposed Lewis structures for the stated formulas. Identify those that violate the rules for electron dot structures. Select all that apply.
 

 

 
 
Question 20
Consider the proposed Lewis structures for the stated formulas. Identify those that violate the rules for electron dot structures. Select all that apply.
 

 

 
 
Question 21
Consider the proposed Lewis structures for the stated formulas. Identify those that violate the rules for electron dot structures. Select all that apply.
 

 q

 
 
 
 
Question Group 10
Question 22
Consider the proposed Lewis structures for the stated formulas. Identify those that violate the rules for electron dot structures. Select all that apply.
 

 
 
 
Question 23
Consider the proposed Lewis structures for the stated formulas. Identify those that violate the rules for electron dot structures. Select all that apply.
 

 
 
 
Question 24
Consider the proposed Lewis structures for the stated formulas. Identify those that violate the rules for electron dot structures. Select all that apply.
 

 

 
 
 
 
Question Group 11
Question 25
Consider the proposed Lewis structures for the stated formulas. Identify those that violate the rules for electron dot structures. Select all that apply.
 

 

 
 
Question 26
Consider the proposed Lewis structures for the stated formulas. Identify those that violate the rules for electron dot structures. Select all that apply.
 

 

 
 
Question 27
Consider the proposed Lewis structures for the stated formulas. Identify those that violate the rules for electron dot structures. Select all that apply.
 

 

 
 
 
 
Question Group 12
Question 28
Consider the proposed Lewis structures for the stated formulas. Identify those that violate the rules for electron dot structures. Select all that apply.
 

 

 
 
Question 29
Consider the proposed Lewis structures for the stated formulas. Identify those that violate the rules for electron dot structures. Select all that apply.
 

 
 
 
Question 30
Consider the proposed Lewis structures for the stated formulas. Identify those that violate the rules for electron dot structures. Select all that apply.
 

 
 
 
 
 
Activity 3 – Electron Dot Wizard
Question Group 13
Question 31
Consider the proposed Lewis structures for the stated formulas. Identify those that violate the rules for electron dot structures. Select all that apply.
 

 

 
 
Question 32
Consider the proposed Lewis structures for the stated formulas. Identify those that violate the rules for electron dot structures. Select all that apply.
 

 
 
 
Question 33
Consider the proposed Lewis structures for the stated formulas. Identify those that violate the rules for electron dot structures. Select all that apply.
 

 

 
 
 
 
Question Group 14
Question 34
Consider the proposed Lewis structures for the stated formulas. Identify those that violate the rules for electron dot structures. Select all that apply.
 

 
 
 
Question 35
Consider the proposed Lewis structures for the stated formulas. Identify those that violate the rules for electron dot structures. Select all that apply.
 

 

 
 
Question 36
Consider the proposed Lewis structures for the stated formulas. Identify those that violate the rules for electron dot structures. Select all that apply.
 

 
 
 
 
 
Question Group 15
Question 37
Consider the proposed Lewis structures for the stated formulas. Identify those that violate the rules for electron dot structures. Select all that apply.
 

 
 
 
Question 38
Consider the proposed Lewis structures for the stated formulas. Identify those that violate the rules for electron dot structures. Select all that apply.
 

 
 
 
Question 39
Consider the proposed Lewis structures for the stated formulas. Identify those that violate the rules for electron dot structures. Select all that apply.
 

 

 
 
 
 
Question Group 16
Question 40
Consider the proposed Lewis structures for the stated formulas. Identify those that violate the rules for electron dot structures. Select all that apply.
 

 

 
 
Question 41
Consider the proposed Lewis structures for the stated formulas. Identify those that violate the rules for electron dot structures. Select all that apply.
 

 

 
 
Question 42
Consider the proposed Lewis structures for the stated formulas. Identify those that violate the rules for electron dot structures. Select all that apply.

 

 
 
 
 
Question Group 17
Question 43
Consider the proposed Lewis structures for the stated formulas. Identify those that violate the rules for electron dot structures. Select all that apply.
 

 

 
 
 
Question 44
Consider the proposed Lewis structures for the stated formulas. Identify those that violate the rules for electron dot structures. Select all that apply.
 

 
 

 
 
Question 45
Consider the proposed Lewis structures for the stated formulas. Identify those that violate the rules for electron dot structures. Select all that apply.
 

 

 
 
 
 
Question Group 18
Question 46
Consider the proposed Lewis structures for the stated formulas. Identify those that violate the rules for electron dot structures. Select all that apply.
 

 

 
 
Question 47
Consider the proposed Lewis structures for the stated formulas. Identify those that violate the rules for electron dot structures. Select all that apply.
 

 
 
 
Question 48
Consider the proposed Lewis structures for the stated formulas. Identify those that violate the rules for electron dot structures. Select all that apply.