Resonance
This video presents the same text shown beside it, spoken and on screen. It adds nothing the text does not say.
State
Resonance describes a molecule whose true electron distribution blends two or more valid Lewis structures, none alone fully accurate.
Show
Ozone is drawn with two structures differing only in which oxygen-oxygen bond is double; the real molecule matches neither.
Watch for
Resonance structures are not different molecules flipping back and forth; the real molecule is one fixed blend.