Resonance Structures in Chemistry
Explore the concept of resonance structures, their rules, and how to draw them for various molecules in Grade 11 Chemistry.
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Resonance Structures Worksheet
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Read each question carefully and provide your best answer. Draw all resonance structures where indicated.
1. Which of the following best describes a resonance structure?
A single Lewis structure that accurately represents a molecule.
A set of two or more Lewis structures that collectively describe the delocalization of electrons within a molecule.
A structure where electrons are localized between two specific atoms.
A structure that shows the movement of atoms, not electrons.
2. Which of the following molecules exhibits resonance?
CH4 (Methane)
CO2 (Carbon Dioxide)
H2O (Water)
NH3 (Ammonia)
3. The actual structure of a molecule exhibiting resonance is a of its contributing resonance structures.
4. In resonance structures, only the of electrons changes, not the positions of the atoms.
5. All resonance structures for a given molecule must have the same number of valence electrons.
True
False
6. Draw all possible resonance structures for the carbonate ion (CO3^2-). Include formal charges on all atoms.
7. Explain why a single Lewis structure is insufficient to describe the bonding in ozone (O3).
Match the term with its correct definition.
8. Delocalization
a. The movement of electrons within a molecule.
9. Resonance Hybrid
b. The actual structure of a molecule that exhibits resonance.
10. Formal Charge
c. The charge an atom would have if all bonds were perfectly covalent.