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Democritus was the man who believed that atoms cannot be destroyed, aren't the same same size, shape, and are always moving but not visible with the naked eye.
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Dalton's law of gasses helped him a lot with his discovery. He realized that everything with matter whether it's a solid, gas, or liquid was made of tiny particles. He called them "Atomos" borrowing Democritus term.
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Thomson believed all matter was made up of particles smaller then atoms. He wouldn't know but later they would be called electrons.
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Rutherford was the worlds first successful alchemist. He also discovered the structure of the atom. Lastly, he was the the first man too split an atom
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Niels Bohr is the reason we have the Bohr model today. Bohr suggested the energy levels of electrons are hidden and that they circle in an orbit around the nucleus.
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Erwin completed a full model of interacting atoms. The particles were like vibrations, only enclosed in a sphere. He helped the unstanding of the visual of the atom by the shroedinger equation.
