In chemistry, resonance or mesomerism is a way of describing delocalized electrons within certain molecules or polyatomic ionswhere the bonding cannot be expressed by one single Lewis structure. A molecule or ion with such delocalized electrons is represented by several contributing structures (or forms) (also variously known as resonance structures (or forms), canonical structures, or, in older works or translations, mesomers) .
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Every structure is associated with a certain quantity of energy, which determines the stability of the molecule or ion (the lower energy, the greater stability). A resonance hybrid has a structure that is intermediate between the contributing structures; the total quantity of potential energy, however, is lower than the intermediate and the molecule is said to be "stabilized by resonance" or "resonance-stabilized". Hybrids are therefore always more stable than any of the contributing structures would be. The difference between the potential energy of the actual structure (the resonance hybrid) and that of the contributing structure with the lowest potential energy is called the "resonance energy".
Please look at the following below links which may help you in your analysis:
https://classnotes.org.in/class11/chemistry/organic-chemistry-some-basic-principles-techniques/resonance-or-mesomerism/
https://www.toppr.com/bytes/resonance-effect/
https://www.britannica.com/science/theory-of-resonance
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