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John hypothesized that an atom is a solid sphere that could not b e result of his research into gases.He realized that certain gases only combined specific proportions.
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J.J. Thomson proposed the plum pudding model of the atom where most of the atom is composed of the pudding the positive portion and the raisins as the smaller electrons.
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The model described the atom as a tiny,dense,positively charged core called a nucleus. nearly all the mass is concentrated, around which the light, negative constituents called electrons, circulate at some distance.
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Is a description of the structure of atoms especially that of hydrogen proposed 1913 by Niels. The model of the atom a radical departure from earlier, classical description, was the first Incorporated.
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Schrodinger discovered that electrons don't orbit the atom. He theorizes electrons move in waves and they have no exact location.