Draw the alternating resonance structure of benzene

Here's the resonance structure of benzene:

Benzene ($\text{C}_6\text{H}_6$) is a cyclic molecule with a six-carbon ring. The delocalized pi electrons in the ring can be represented by two alternating resonance structures.

Resonance Structure 1:
Imagine a hexagon where the double bonds are between carbons 1-2, 3-4, and 5-6.

Resonance Structure 2:
Imagine the same hexagon, but the double bonds are now between carbons 2-3, 4-5, and 6-1.

These two structures are equivalent and contribute equally to the overall structure of benzene. The actual structure is a resonance hybrid, where the pi electrons are delocalized evenly around the entire ring, giving all carbon-carbon bonds an intermediate length and strength between a single and a double bond. This delocalization makes benzene unusually stable.