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The Alchemists were a group of men who believed that you could turn ordinary metals into gold.
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Democritus was a Greek philosopher who elaborated a system originated by Leucippus into a material account of the natural world.
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Plato was an Athenian philosopher during the classical period in Ancient Greece. He founded the Platonists.
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Aristotle was one of the biggest figures in ancient Greek Philosophy, he made important contributions to logic, criticism, rhetoric, physics, biology, psychology, math, metaphysics, ethics, and politics. He was also a student of Plato for 20 years but is mostly famous for rejecting Plato's theory of forms.
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Robert Boyle proposed a law that states that the volume of gas decreases as the pressure increases, proportionally.
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Lavoisier was an experimenter who revolutionized the world of chemistry due to his discoveries of, Oxygen, Nitrogen, Silicon, and Carbon.
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John Dalton was a school teacher, and a meteorologist. He was overall best known for creating the theory of atomism, and found out ways to calculate atomic mass.
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J.J. Thompson discovered the electron by experimenting with crooks, or cathode ray. He demonstrated that cathode rays were negatively charged.
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Mendeleev was a Russian chemist who jotted down the symbols for the chemical elements, and put them in order according their mass. He also was the founder of the periodic table.
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Albert Einstein was a German physicist who proposed the theory of "General Relativity".
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The Curies discovered the elements of polonium and radium.
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In 1913 Mosely used his own self built equipment to prove that every element's identity is uniquely determined by the number of protons it has.
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He proposed a theory for the hydrogen atom based on quantum theory that energy is transferred only by certain well defined quantities.
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Millikan is famous for measuring the charge of the electron in his famous oil drop experiment which has revolutionized what we think of the atom .
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Heisenberg contributed to the atomic theory through formulating quantum mechanics in terms of matrices and in discovering the uncertainty principle.
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Ernest Rutherford postulated the nucleus of the atom, and proposed the laws of radioactive decay.
