Atomic Theory Timeline

By tpahulu
  • 430

    Democritus

    He proposed the first idea of the atom.

  • LaVoisier

    Made the Law of conservation of Mass

  • Proust

    Created the Law of Definite Proportions

  • Gay-Lussac

    Found the Law of Combining Vomlumes.

  • John Dalton

    Found the Law of Multiple Proportions and proposed the first atomic theory.

  • Amedeo Avogardo

    Equal volumes of gases, under the same conditions have the same number of particles.

  • Wilhelm Roentgen

    discovered the x-ray

  • Henry Bequerel

    Discovered that uranium ores emit radiation.

  • JJ Thompson

    Used cathode rays to discover the electron measured the bending of the rays to determine the charge to mass radio of the electron

  • Max Planck

    discovered the quantum theory

  • Albert Einstein

    discovered the photoelectric effect

  • ernest Rutherford

    Discovered the nuclear model

  • Robert Millikan

    Performed the oil drop experiment.

  • Henry Mosley

    Used x-ray to discover the atomic number of an element

  • Niels Bohrs

    Improved the Atomic Model

  • DeBroglies Hypothesis

    If waves can behave like particles, then particles can behave like waves.

  • Schrodinger

    Shrodingers wave equation. Treat the electron like a wave.

  • Heinsenberg

    Its impossible to know both position and velocity at the same time

  • James Chadwick

    Discovered the neutron