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Proposed that the world is made up of tiny particles called atoms and empty space; believed that atoms were the smallest particle of matter and the idea that matter is made up of atoms (Atomic Theory of matter)
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Separated chemistry from alchemy and gave the first definitions to chemical element, chemical reaction and chemical analysis.
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Father of Modern Chemistry, First law of conservation of mass, recognized and named oxygen and hydrogen
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First useful atomic theory of mass in 1803, propsed homogenous spheres or the billiard ball model of atoms
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Discovered that cathode rays impart a negative charge to objects that they strike
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Discovered Protons through observations of cathode rays which he noted emited a glow near the ends which suggested energy extending from a negative electrode
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Discovered the electron through experiments with a cathode ray tube and propsed the plum pudding model
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performed oil drop experiment which measured the electric charge of an atom
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Father of Nuclear Physics, discovered the nucleus through the gold foil experiment and proposed a nuclear model of the atom
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Danish Physicist, contributed to atomic structure by applying quantum theory to Rutherford's atomic structure and creating the planetary model of the atom
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Proved the existence of neutrons
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Fundamental theory of matter that four elements (earth, air, fire, water) formed matter
