What is plum pudding theory?
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The plum pudding model was an early (and incorrect) 20th century model of an atom. It was proposed by J.J. ... Thomson's model showed an atom that had a positively charged medium, or space, with negatively charged electrons inside the medium.
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The 'plum pudding' model of the atom was proposed by JJ Thomson, who had also discovered the electron. It was put forth before the discovery of the nucleus. According to this model, the atom is a sphere of positive charge, and negatively charged electrons are embedded in it to balance the total positive charge. The electrons are like plums in a pudding.
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