Lewis Structures Practice Worksheet
A Grade 10 Chemistry worksheet focusing on drawing and understanding Lewis structures for various molecules.
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Lewis Structures Practice
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Read each question carefully and follow the instructions to draw Lewis structures or answer questions about them. Remember to show all valence electrons and formal charges where applicable.
1. Draw the Lewis structure for water (H₂O).
2. Draw the Lewis structure for carbon dioxide (CO₂).
3. Draw the Lewis structure for ammonia (NH₃).
1. In a Lewis structure, a single dash represents two shared electrons.
True
False
2. All atoms in a stable Lewis structure must satisfy the octet rule.
True
False
1. The total number of valence electrons in a Lewis structure for a neutral molecule is the sum of the valence electrons from each in the molecule.
2. Lone pairs are pairs of electrons that are not involved in .
3. When drawing Lewis structures, the central atom is usually the least atom.
1. How many lone pairs are present on the central atom in the Lewis structure of methane (CH₄)?
0
1
2
4
2. Which of the following elements can sometimes have an expanded octet in its Lewis structure?
Carbon
Oxygen
Sulfur
Hydrogen
1. Explain why knowing how to draw Lewis structures is important in chemistry.