Lewis Structures
Learning Objective
I can draw Lewis structures for small molecular compounds.
Key Concepts
In Lewis diagrams, dots are used to represent valence electrons.
In covalent bonding, atoms share valence electrons in order to obtain a full octet or duet.
When drawing Lewis diagrams, the five steps are: Count valence electrons, determine the central atom, draw single bonds, add remaining valence electrons as lone pairs, and turn lone pairs into double or triple bonds to give every atom an octet or duet.
Practice Questions
This lesson includes 11 practice questions to reinforce learning.
View questions preview
1. What is the first step in drawing a Lewis diagram for a molecule?
2. Draw the Lewis diagram for carbon dioxide (CO₂).
3. What is the octet rule, and which element is an exception to this rule?
...and 8 more questions
Educational Video
Lewis Diagrams Made Easy: How to Draw Lewis Dot Structures
ketzbook