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Dalton believed everything was made from atoms, that they were the smallest form of matter, and that they joined together to form compounds. He envisioned atoms as solid spheres.
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Thompson introduced the idea of electrons, as well as the nucleus. He described the atom as a positively charged soup with negative electrons floating around.
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Rutherford proposed that electrons instead revolved around the nucleus, like the moon around the earth.
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Bohr believed electrons revolved around the nucleus on different fixed rings, and the further away the rings were, the greater energy the electron had.
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Schrodinger's model was similar to the Planetary model, except he believed the electrons followed 3-dimensional wavefunctions.