As I was trying to understand resonance, I got to know that it was imaginary phenomenon and it is just a tool to explain mechanisms and structures that are unexplained by Lewis dot structures or structures where bonds are localized.
Hence its proper description is now done using molecular orbital theory which is beyond scope of studies for new students. Now after that I got to know that delocalization of electrons releases energy or "increase stability" of system, there are two explanations on Stack Exchange:
One of the explanation on Stack Exchange uses "Particle in box" concept to explain the phenomenon, that is: larger the length, less is the energy.
The other explanation involves saying "delocalization causes charge cloud over large volume decreasing charge density, hence decreasing energy of system".
My question is: How can charge distribute over a volume if it is quantized? Does it come in discrete packets in form of electrons?
If this has any relation to probability of charge occurrence, the first explanation cannot be used, hence is there any rough, simple and intuitive explanation rather than using quantum mechanics and "Particle in box" etc.?