Chemistry Timeline

By KayGutk
  • Jan 1, 1000

    415BC Democritus

    415BC Democritus
    proposed the idea that matter wasn't infinitely divisible, believed matter was made up of individual particles called "atomos"
  • Jan 1, 1000

    353BC Aristotle

    353BC  Aristotle
    Aristotle rejected the atomic "theory" entirely
  • Jun 5, 1288

    Battle of Worringen

    Battle of Worringen
    John I of Brabant defeats the duchy of Guelders and wins possession of the duchy of Limburg
  • Mar 15, 1311

    Battle of Halmyros

    Battle of Halmyros
    The Catalan Company defeats Walter V of Brienne to take control of Duchy of Athens.
  • Oct 28, 1492


    Columbus lands in Cuba and discovers the New World
  • Antonie Lavoshire

    Antonie Lavoshire
    Antonie Lavoshire discover the phlogiston theory was inncorrect, he recognized and named hydrogen and oxygen
  • Joesph Proust

    Joesph Proust
    Stated and proved the Law of Definite Proportions
  • John Dalton

    John Dalton
    John Dalton revived and revised Democritus's ideas based on scientific resarch he had performed.
  • Amadeo Avogadro

    Amadeo Avogadro
    Studied atoms and the laws of gases.
  • William Crooks

    William Crooks
    William Crookes discovered Thallium.
  • Henri Becquerel

    Henri Becquerel
    Discovered radioactivity
  • J.J. Thomson

    J.J. Thomson
    JJ Thomson was the first to suggest tht an atom was made up of smaller particles called electrons.
  • Madame Curie

    Madame Curie
    Discovered radioactivity, polonium, radium
  • Max Planck

    Max Planck
    Max Planck discovers the Quantum Theory
  • Robert Millikan

    Robert Millikan
    Robert Millikan measured the charge on a single electron.
  • Ernest Rutherford

    Ernest Rutherford
    Ernest Rutherford discovers a radioactive atom changes to a different atom on emission of radiation.
  • Henry Moseley

    Henry Moseley
    Henry Moseley discovers the atom of each elemnet contain a unique positive charge.
  • Niels Bohr

    Niels Bohr
    Niels Bohr studied the structures on a atom
  • Albert Einstein

    Albert Einstein
    Discover the theory of relativity and the mass energy equivalence to E= mc(squred)
  • Louis deBroglie

    Louis deBroglie
    Louis deBroglie discovered the properties of a electron
  • Erwin Schrodinger

    Erwin Schrodinger
    Erwin Schrodinger developed the wave equation, called the Schrodinger equation
  • Werner Heinsenberg

    Werner Heinsenberg
    Werner Heisenberg developes the uncertainty priciple, while working on the mathematical foundations of quantum mechanics
  • James Chadwick

    James Chadwick
    John Chadwick discovers the existence neutron