• Antoine Lavoisier

    Explained combustion.
  • Law of Conservation of Mass

    Mass can't be created or destroyed
  • Dalton's Atomic Theory

    Guidelines for science.
  • John Dalton

    Guidelines for Chemistry.
  • Law of Definite Proportions

    chemical compounds contain a fixed & constant proportion of elements.
  • Joseph Louis Proust

    Law of Definite Proportion
  • Dmitri Mendeleev

    Formed Chemisrty. Periodic Table
  • Eugen Goldstein

    Canal Rays
  • Marie Curie

    she discovered X-Rays.
  • J.J. Thompson

    Cathode Ray
  • Cathode Ray Tube

    Used to Transmit Pictures
  • Plum Pudding Atomic Model

    Charged Particals
  • Gold Foil Experiment

    Termed the Nucleus
  • Ernest Rutherford

    Gold Foil Experiment.
  • Robert Millikan

    Millikan oil-drop experiment.
  • Rutherford Model

    alpha particles rebounded almost directly backwards.
  • Bohr Planetary Model

    Quantum Mechanics
  • Henry Moseley

    Arranged the Periodic Table
  • Niels Bohr

    Quantum Mechanical Model
  • Erwin Schrodinger

    atomic theory visable.
  • Quantum Mechanical Model

    Electrons defined as standing waves.
  • James Chadwick

    Nuetron could not be a proton-electron pairing element.
  • Lise Meitner

    Nuclear Fission
  • Democritus

    He started it all.