History of the Atom Timeline by Tayla Jefferson and Jada Thompson

By tayla.jefferson2018

  • Democritus

    Democritus
    He discovered that everything is composed of matter
    He thought that an atom cannot be broken down any futher. He called his model " Atomos"

  • Thomson

    Thomson
    He believed that an atom consist of a a ssphere of poositive charge with negatively charge electron embedded in it. He called his model "Plum Pudding"

  • Rutherford

    Rutherford
    He demonstrated taht cathode rays were negatively charged. He used the Gold Foil Experiment. His model had the name JJ Thomson Plum Pudding,but he had to discard it.

  • Dalton

    Dalton
    He believed that all matter is made up of atoms. He thought is atom was a billard ball. He called his atomic model plum pudding.

  • Bohr

    Bohr
    <a href='http://Stanley, Matthew. "Bohr, Niels." World Book Student. World Book, 2015. Web. 27 Feb. 2015. ' He discovered that positively charged nucleus surrounded by electrons that traveled in circular orbits around the nuclues

  • Heinsenburg & Schrodinger

    Heinsenburg & Schrodinger
    He thought that atoms was only made up of protoons and electrons. They used the Quantum fluctuatuon. They named their model the Quantum mechanical Model