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Periodic Table Timeline
10 Oct 2017
Dmitri Mendeleev publishes his version of the periodic table
John Newlands publishes his law of octaves
Alexandre-Émile Béguyer de Chancourtois arranges atoms in weight order
Johann Wolfgang Döbereiner publishes law of triads
John Dalton publishes his atomic model
William Ramsay discovers the Noble Gases
Glenn Seaborg synthesises transuranic elements (the elements after uranium in the periodic table)
Edwin McMillan and Philip H. Abelson identify neptunium, the lightest and first synthesizes transuranium element, found in the products of uranium fission.
Henry Moseley determines the atomic number of each of the elements and modified the 'Periodic Law'
Ernest Rutherford discovers the source of radioactivity as decaying atoms
Marie and Pierre Curie isolates radium and polonium from pitchblende
Lothar Meyer develops an early version of the periodic table, with 28 elements organized by valence
Jakob Berzelius develops a table of atomic weights & introduced letters to symbolize elements
Johann Dobereiner developed groups of 3 elements with similar properties
Carl Wilhelm Scheele and Joseph Priestly independently isolates oxygen
Henry Cavendish discovers hydrogen as a colorless, odourless gas that burns and can form an explosive mixture with air
Antoine Lavoisier writes the first extensive list of elements containing 33 elements & distinguished between metals and non-metals
Joseph Black isolated carbon dioxide, which he called "fixed air"
Robert Boyle publishes "The Sceptical Chymist" which was a treatise on the distinction between chemistry and alchemy. It also contains some of the earliest ideas of atoms, molecules, and chemical reaction marking the beginning of the history of modern chemistry
Sir Francis Bacon publishes "The Proficience and Advancement of Learning" which contained a description of what would later be known as the scientific method
Plato coins term 'elements' (stoicheia)
Aristotle proposes the four element theory: earth, air, fire & water
Democritus and Leucippus propose the idea of the atom, an indivisible particle that all matter is made of
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