Resonance Substances Summary

Resonance Concepts

• Resonance: A phenomenon where certain molecules can be represented by two or more valid Lewis structures.

Substances for Resonance

• SO₃ (Sulfur Trioxide)

  • Exhibits resonance due to multiple resonance structures.

• CO₂ (Carbon Dioxide)

  • Does not exhibit resonance; has a stable double bond between carbon and each oxygen.

• NH⁺ (Ammonium Ion)

  • Does not exhibit resonance; has a single structure with no alternative forms.

Selected Answers

• Substances Exhibiting Resonance:
  • Answer should identify: I only (SO₃).
  • Other options (II and III, CO₂ and NH⁺) do not exhibit resonance.