Resonance Structures: AP Chemistry Definition

What are resonance structures?

Resonance structures refer to different Lewis structures that represent the same molecule and illustrate the delocalisation of electrons within the molecule. In AP® Chemistry, understanding resonance is crucial as it helps explain the stability and reactivity of compounds. These structures are used when a single Lewis structure cannot accurately depict the delocalised nature of electrons within a molecule. By considering all resonance structures, students can better appreciate the distribution of electron density and predict molecular properties more accurately.

It is important to note that resonance structures themselves are not real; instead, the true molecular structure is a hybrid of all possible resonance forms, leading to an overall stabilisation due to electron delocalisation.

Resonance Structures Revision Resources to Ace Your Exams

For more information about resonance structures check out the following resources:

• Resonance Structures Revision Notes

• Lewis Diagrams Exam Questions

Explore our AP Chemistry Revision Resources.