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Democritus
First to propose that matter exists in the form of particles. Coined the term 'atoms'. -
Litmus Paper was invented
Beckman invented a certain type of litmus paper, but it was brought into general use first in the 1600's by Robert Boyle -
Joseph Priestley
Joseph Priestley demonstrated that plants produce a gas that animals and flames consume. Those two gases are carbon dioxide and oxygen. -
Friedrich Woehler
synthesized urea which was the first synthesis of an organic compound from inorganic starting materials. -
Friedrich August Kekulé von Stradonitz
Friedrich August Kekulé von Stradonitz realized that benzene is composed of carbon and hydrogen atoms in a hexagonal ring. -
Jacobus van 't Hoff and Joseph-Achille Le Bel
Jacobus van 't Hoff and Joseph-Achille Le Bel advanced a three-dimensional stereochemical representation of organic molecules and propose a tetrahedral carbon atom. -
Mikhail Tsvet
Mikhail Tsvet discovered the chromatography technique for organic compound separation -
Mikhail Tsvet
Mikhail Tsvet discovered the chromatography technique for organic compound separation. discovered the chromatography technique for organic compound separation. -
IUPAC introduced
IUPAC was established in 1919 as the successor of the International Congress of Applied Chemistry for the advancement of chemistry -
Carbon was discovered
Carbon-14 was discovered on 27 February 1940, by Martin Kamen and Sam Ruben at the University of California Radiation Laboratory in Berkeley, although its existence had been suggested by Franz Kurie in 1934.