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Top: The periodic table of the chemical elements. Below: Examples of certain chemical elements. From left to right: hydrogen, barium, copper, uranium, bromine, and helium.

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Agricola, author of De re metallica

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Workroom, from De re metallica, 1556, Chemical Heritage Foundation

John Dalton is remembered for his work on partial pressures in gases, color blindness, and atomic theory

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Jabir ibn Hayyan (Geber), considered the "father of chemistry", introduced a scientific and experimental approach to alchemy.

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