According to the Thomson model of the atom,what is the simplest negative particle in an atom?

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According to the Thomson model of the atom, the simplest negative particle in an atom is the electron. The model proposed that atoms consisted of a positively charged "pudding" with negatively charged electrons embedded throughout, much like plums in a pudding. The presence of the negatively charged electrons was inferred from experiments involving cathode ray tubes.

According to the Thomson Model of the Atom,what Is the Simplest