What is the Plum Pudding Model?


It is the model of the atom proposed by J. J. Thomson where inside a uniform "ball" of positive charge are located small "plums" of negatively charged electrons.


Thomson knew about the existence of the electrons (he measured some of their properties) but didn't know a lot about the structure of the positive charge inside the atom.
He tried this:
inserisci qui la fonte dell'immagine

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