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what is the atomic theory contribution Thomson

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whats the thomson at the end for?
like what was his contribution to the atomic theory
J J Thomson was the first person to suggest the theory of the atom containing positive and negative particles, and demonstrated the latter which he called electrons. He experimented with cathode ray tubes to show how electron beams were deflected by magnetic forces. He also showed the hydrogen atom has one electron. He worked at Cambridge EnglandHis atomic theory identified that electrons inside an atom could show, meaning that atoms were not invisible. Thomson suggested that the model of an atom as a sphere of positively charged matter with negatively charged electrons surrounding them. He stated that electrons were positioned by electrostatic forces. After the discovery of the electron and proton as subatomic particles J.J. Thomson had started to discover atomic theory that gives complete explanation of atomic structure.According to Thomson protons are embed in the atoms like a water melon and electrons are present in atoms to make the atom electrically neutral.his discovered atomic theory was not able to explain the atomic structure properly

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not my answer thats wiki's answer :)

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