1860 ⟶ Cannizzaro's Table of Atomic Weights Leads to Resolution of Atomic Weights and Development of Periodic Law

Stanislao Cannizzaro, resurrecting Avogadro's ideas regardin...
Timelines Logo
Year
1860
1862
1864
1869

⚛️ Cannizzaro's Table of Atomic Weights Leads to Resolution of Atomic Weights and Development of Periodic Law

Stanislao Cannizzaro, resurrecting Avogadro's ideas regarding diatomic molecules, compiles a table of atomic weights and presents it at the 1860 Karlsruhe Congress, ending decades of conflicting atomic weights and molecular formulas, and leading to Mendeleev's discovery of the periodic law.⟶
Cannizzaro's Table of Atomic Weights Leads to Resolution of Atomic Weights and Development of Periodic Law (1860)
Atomic WeightsMolecular FormulasChemistryPeriodic TableStanislao Cannizzaro19th Century ScienceKarlsruhe CongressDiatomic MoleculesMendeleev
ItalyItalyGermanyGermany

🌀 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.⟶
De Chancourtois Publishes Telluric Helix, Early Periodic Table (1862)
Periodic TableChemistryAlexandre-Emile Béguyer de ChancourtoisElement Classification19th Century ScienceTelluric HelixChemical Elements
FranceFrance

🎵 Newlands Proposes Law of Octaves

John Newlands proposes the law of octaves, a precursor to the periodic law.⟶
Newlands Proposes Law of Octaves (1864)
Law of OctavesPeriodic LawChemistryJohn NewlandsElement Classification19th Century SciencePeriodic Table
United KingdomUnited Kingdom

🗓️ Lothar Meyer Develops Early Periodic Table

Lothar Meyer develops an early version of the periodic table, with 28 elements organized by valence.⟶
Lothar Meyer Develops Early Periodic Table (1864)
Periodic TableChemistryLothar MeyerElement Classification19th Century SciencePeriodic LawValenceChemical Elements
GermanyGermany

🗓️ Mendeleev Publishes Periodic Table

Dmitri Mendeleev publishes the first modern periodic table, with the 66 known elements organized by atomic weights. The strength of his table was its ability to accurately predict the properties of as-yet unknown elements.⟶
Mendeleev Publishes Periodic Table (1869)
ChemistryPeriodic TableMendeleevElements19th CenturyAtomic TheoryChemical PropertiesClassification
RussiaRussia