The History of the Atom by Brianna Mercer and Caleb Honora

By Brianna Mercer
  • 100

    Democritus (400 BC)

    Democritus (400 BC)
    Democritus discovered the idea of the atom by a theory of his thoughts. He knew that if he the ate cut an object in half enough, you would eventually reach a small particle he named the atom. He thought that each different element had a separate shape. Huffman, Carl A. "Democritus." World Book. World Book Inc., 2015. Web. 20 Feb. 2015.
    Democritus Atom Model. Digital image. The History of the Atom. N.p., n.d.

  • Dalton

    Dalton
    John Dalton brought up the idea of the atom once again and thought that every atom also had their own weight. His theory came from the thought process that the total pressure of a group of gases was the sum of all the individual gas's pressure. Dalton thought that atoms were just small 3D objects put together.
    Usselman, Melvin C. "Dalton, John." World Book. World Book Inc., n.d. Web. 25 Feb. 2015.

  • Thomson

    Thomson
    J.J. Thomson discovered the electrons using electric discharge in a high-vacuum cathode-ray tube. He proves his observations through experiments. But he thought the atoms looked like a ball of positive charge he called it "Plum Pudding".
    "GaggleTube Video - Discovery of the Electron: Cathode Ray Tube Experiment." GaggleTube Video - Discovery of the Electron: Cathode Ray Tube Experiment. Gaggle.net, n.d. Web. 23 Feb. 2015.

  • Rutherford

    Rutherford
    Rutherford discover atoms had nucleus, also he discovered an alpha particle tiny,positively charged particle much smaller than an atom. He used experiments to make his discovery about the atom. And he said they looked like our solar system which he called it the ''Gold Foil Experiment"
    "GaggleTube Video - Discovery of the Nucleus: Rutherford's Gold Foil Experiment." GaggleTube Video - Discovery of the Nucleus: Rutherford's Gold Foil Experiment. Gaggle.net, n.d. Web. 23 Feb. 2015.

  • Bohr, Niels

    Bohr, Niels
    Bohr theorized that the atom had a tiny, positively charged nucleus with even smaller negatively charged neutrons orbiting it. In addition to that, he described that electrons had limits to where they go, and that the higher levels could hold more electrons that the lower levels. He then proposed that atoms released radiation such as light. He thought that this happened when electrons jump to lower levels.
    Stanley, Matthew. "Bohr, Niels." World Book. World Book Inc., n.d. Web. 25 Feb. 2015.

  • Heisenburg and Schrodinger

    Heisenburg and Schrodinger
    https://the-history-of-the-atom.wikispaces.com/Werner+HeisenbergHeisenburg and Schrodinger said electrons do not travel in neat orbits, he said all electrons that contain photons will then change momentum and physics. Heisenburg also contributed the atomic theory which he calculated the behaviors of electrons, which he gave people more understanding of the pattern of atom. Thius was done during his experiments. He thought they looked like an elctric cloud