Atomic Theory

By Owen.shedroff
  • 475 BCE

    Democritus

    The atom cannot be destroyed, differ in size, shape, and temperature, are always moving, and are invisible
  • 371 BCE

    Aristotle

    Aristotle was well read in many fields but didn't believe in the atomic theory, he believed everything was made of earth, wind, water, and fire.

  • Evangelista Toricelli

    HE invented the barometer, was considered the father of hydrodynamics, and improved the telescope

  • antoine lavoisier

    Discovered and named oxygen and hydrogen. he declined that gasses had a negative weight.

  • Joseph Louis Proust

    Made the law of constant composition which states that a compound has a mass of the sum of its parts.

  • Ernest Rutherford

    Theorized that atoms had a heavy nucleus and tried to prove this with his famous gold foil experiment.

  • Niels Bohr

    Theorized that energy is only transferred in certain quantities. Electrons only move in certain orbits.

  • JJ Thomson

    Discovered the electron cathode ray tube and used it to prove atoms were divided into electrons, protons, and neutrons

  • Erwin Shrodinger

    Developed an equation to find the orbit of electrons.

  • Louis De Brogile

    Worked with quantum theory predicting wave nature of electrons and he won a Nobel prize.

  • werner Shrodinger

    Added Quantum mechanics to figure out the behavior of elementary particles.