prashantazazel
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If they are the same, then the electrical conductivity of Iron and Aluminium would be the same - and you know all too well it is NOT (aluminium being one of the worst in the metals). Go figure!
Existence of an electron has not been proven yet but if they do exist, iron and aluminium electrons will not be the same for above scientifically proven tests of conductivity.
Also, the induction heaters do not heat up aluminium. If electrons is the charge carrier and electrons are the same in each metal, the 24khz (or thereabouts) signal from the Tesla copper coil inside the induction heater would heat up aluminium too. Resonant frequencies of the metals are different so how can these so-called electrons be the same!? Such a theory makes absolutely no sense!
Existence of electrons is proven. Not everything needs to be visualised. Its presence has been inferred using plenty of scientific experiments.
We wouldn't be successful at designing electronics, the electron microscope, cathode ray tubes, vacuum tubes if the fundamental idea of an electron was flawed.
Regarding difference in conductivity of various metals, the main difference lies in their atomic structure.
The electron of some metals are held less tightly than other metals.