Question

What is resonance structure?​

Answer 1

Answer:

A molecule or ion with such delocalized electrons is represented by several contributing structures (also called resonance structures or canonical forms).

Answer 2

Resonance structures are used when a single Lewis structure cannot fully describe the bonding; the combination of possible resonance structures is defined as a resonance hybrid, which represents the overall delocalization of electrons within the molecule. In general, molecules with multiple resonance structures will be more stable than one with fewer and some resonance structures contribute more to the stability of the molecule than others - formal charges aid in determining this.