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The Ancient Greeks believed that everything in our world was made out of four major elements which were; fire, water and air. They also believed everything around us was made of Earth (rock and dirt).
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He investigated reactions of gases and ratios.
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Made the plum pie model, where all electrons are mashed together in a single particle.
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Created the Bohr Model, where the electron is treated as a particle in fixed orbits around the nucleus
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Schrodinger discovered that electrons don't move in orbits (or in a set path at all). He theorized electrons move in waves, and they have no exact location.
