What are resonance structures? Why are they necessary?
A resonance form is another way of drawing a Lewis dot structure for a given compound. Equivalent Lewis structures are called resonance forms.
Benzene is commonly seen in Organic Chemistry and it has a resonance form. Benzene has two resonance structures, showing the placements of the bonds
Another example of resonance is ozone. Ozone is represented by two different Lewis structures. The difference between the two structures is the location of double bond.