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1803 he revealed the concept of Dalton’s Law of Partial Pressures. Also in the 1800s, he was the first scientist to explain the behavior of atoms in terms of the measurement of weight
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Discovered the electron.
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Suggested a model of the atom as a sphere of positive matter in which electrons are positioned by electrostatic forces.
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As part of his Special Theory of Relativity, he made the intriguing point that a large amount of energy could be released from a small amount of matter. This was expressed by the equation E=mc2 (energy = mass times the speed of light squared).
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Rutherford discovered the nucleus of an atom
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Bohr published his model of atomic structure. He said that electrons order the nucleus within energy levels.
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A model of the atom was developed by Erwin Schrodinger i
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Introduced his theory of particle-wave duality
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Created his theory of quantum mechanics, published in 1925
