1894 ⟶ William Ramsay discovers noble gases
William Ramsay discovers the noble gases, which fill a large...
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1894
1962
🌀 De Chancourtois Publishes Telluric Helix, Early Periodic Table
Alexandre-Emile Béguyer de Chancourtois publishes the telluric helix, an early, three-dimensional version of the periodic table of the elements.⟶
Periodic TableChemistryAlexandre-Emile Béguyer de ChancourtoisElement Classification19th Century ScienceTelluric HelixChemical Elements
France🗓️ Lothar Meyer Develops Early Periodic Table
Lothar Meyer develops an early version of the periodic table, with 28 elements organized by valence.⟶
Periodic TableChemistryLothar MeyerElement Classification19th Century SciencePeriodic LawValenceChemical Elements
Germany🧪 Alfred Werner establishes coordination chemistry
Alfred Werner discovers the octahedral structure of cobalt complexes, thus establishing the field of coordination chemistry.⟶
ChemistryCoordination ChemistryInorganic ChemistryWerner, AlfredOctahedral ComplexesChemical BondingMolecular Structure19th Century ChemistryLigands
Switzerland🎈 William Ramsay discovers noble gases
William Ramsay discovers the noble gases, which fill a large and unexpected gap in the periodic table and led to models of chemical bonding.⟶
ChemistryNoble GasesPeriodic TableRamsay, WilliamArgonHeliumChemical Elements19th Century ChemistryInert GasesChemical Bonding
United Kingdom🧪 Xenon Compounds Synthesized, Noble Gases React
Neil Bartlett synthesizes xenon hexafluoroplatinate, showing for the first time that the noble gases can form chemical compounds.⟶
ChemistryNoble GasesXenonChemical CompoundsInorganic ChemistryReactivityChemical Synthesis
United States