![]() ![]() Of the many scientific models of an atom, the Thomson atomic model is the one we can compare with a watermelon in appearance. Thomson first demonstrated how air is ionised in X-rays. ![]() He also believed that an atom comprises a cloud of negatively charged particles in a sphere of positive charges. Thomson, electrons are 2,000 times lighter than a proton. The name “electrons” was given to these particles. In 1897, he discovered negatively charged particles through an experiment called the cathode ray tube experiment. Of the many scientists who proposed models for atomic structure, J.J. Later, the postulates proposed in the Dalton Atomic Theory were disapproved of because of JJ Thomson’s discovery of subatomic particles.īecause of JJ Thomson’s discovery of subatomic particles, the search for how these are arranged in an atom started. In this theory, he described atoms as indivisible particles, which means that they cannot be broken down into further smaller particles. ![]() Historyīefore the subatomic particles were discovered, Dalton’s atomic theory was given by John Dalton. This article is aimed at discussing this Thomson atomic model in detail. One of the early models of atoms, called the Thomson atomic model, has been compared to these food items in terms of appearance. You all must have seen a watermelon, a raisin pudding and a plum pudding in your daily lives. ![]()
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