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discovers theory of light and colour, Proposed a mechanical universe with small solid masses in motion.
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Has the idea of fixed ratio combinations and valencies.
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discovers electricity is made of negative particles- electrons.
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creates a model of a solid atom- negatively charged electrons are embedded in a positive sphere.
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Quantum theory-interaction between matter and radiation.
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discovers that electrons revolve around the positively charged centre of the atom.
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discovers the measurement of the charge of an electron.
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Described the atom as having a central positive nucleus surrounded by negative orbiting electrons. Gold foil experiment.
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finds out that all positive charges are in the atom.
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Depicts the atom as a small, positively charged nucleus surrounded by electrons that travel in circular orbits around the nucleus with electrostatic forces providing attraction.
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Discovered the neutron.