Atomic Theory Timeline

  • 400 BCE

    Democritus

    Democritus
  • 350 BCE

    Alchemists

    Alchemists
  • 270 BCE

    Cathode Ray Tube

    Cathode Ray Tube
  • Joseph Louis Proust

    Joseph Louis Proust
  • John Dalton

    John Dalton
  • Law of Definite Proportions

    Law of Definite Proportions
  • Antoine Lavoisier

    Antoine Lavoisier
  • Law of Conservation of Mass

    Law of Conservation of Mass
  • Dalton’s Atomic Theory

    Dalton’s Atomic Theory
  • Dmitri Mendeleev

    Dmitri Mendeleev
  • Henry Moseley

    Henry Moseley
  • J.J Thomson

    J.J Thomson
  • Plum Pudding Atomic Model

    Plum Pudding Atomic Model
  • Werner Heisenberg

    Werner Heisenberg
  • Gold Foil Experiment

    Gold Foil Experiment
  • Oil Drop Experiment

    Oil Drop Experiment
  • Robert Millikan

    Robert Millikan
  • Nuclear Model

    Nuclear Model
  • Ernest Rutherford

    Ernest Rutherford
  • Niels Bohr

    Niels Bohr
  • Planetary Model

    Planetary Model
  • Erwin Schrodinger

    Erwin Schrodinger
  • Quantum Mechanical Model

    Quantum Mechanical Model
  • James Chadwick

    James Chadwick