Lewis Dot Structure Worksheet
A Grade 12 Chemistry worksheet focusing on understanding and drawing Lewis Dot Structures for various molecules and ions.
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Lewis Dot Structure Worksheet
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Read each question carefully and provide the best answer. Show all your work for drawing Lewis Dot Structures.
1. What is the primary purpose of drawing Lewis Dot Structures?
To determine the atomic mass of an element.
To represent the arrangement of valence electrons in a molecule.
To calculate the bond energy of a chemical bond.
To identify the type of intermolecular forces present.
2. How many valence electrons does a nitrogen atom have?
2
3
5
7
3. In a Lewis Dot Structure, a single line represents a bond, which consists of two shared electrons.
4. The octet rule states that atoms tend to gain, lose, or share electrons in order to achieve a full outer shell with valence electrons.
5. Draw the Lewis Dot Structure for water (H₂O). Show all valence electrons and any lone pairs.
6. Draw the Lewis Dot Structure for carbon dioxide (CO₂).
7. Draw the Lewis Dot Structure for the polyatomic ion, nitrate (NO₃⁻). Remember to account for the charge.
8. All atoms in a stable Lewis Dot Structure must satisfy the octet rule.
True
False
9. Resonance structures are necessary when a single Lewis Dot Structure cannot accurately represent the bonding in a molecule.
True
False
10. Explain the concept of formal charge and how it is used to determine the most plausible Lewis Dot Structure for a molecule or ion. Provide an example to illustrate your explanation.