History of the atom timeline Kadarrius- Jamie

By james@durant
  • 111

    Democritus

    Democritus
    Democritus believed that there was an atom and once it was invisible, absolutely small, it couldn't be cut anymore.
    The Editors of Encyclopædia Britannica. "Democritus (Greek Philosopher)." Encyclopedia Britannica Online. Encyclopedia Britannica, n.d. Web. 27 Feb. 2014.
  • 112

    Aristotle

    Aristotle
    He believed that there was no atom and all Earth was made of earth, water, fire, wind,
    Shields, Christopher. "Aristotle." Stanford University. Stanford University, 25 Sept. 2008. Web. 25 Feb. 2014.

  • Dalton

    Dalton
    All matter is made of atoms. atoms are indivisible and indestructible.
    Funk, Maree. 5.2 Atomic Model. N.d. Moodle.

  • Thomson

    Thomson
    Discovered that atoms have electrons
    Funk, Maree. 5.2 Atomic Model. N.d. Moodle.

  • Rutherford

    Rutherford
    Found that there is a nucleaus in the middle with a positive charge.
    Did Gold foil experiment shot alpha particles at gold foil discovered something large with a positive charge.
    The Editors of Encyclopædia Britannica. "Rutherford Atomic Model." Encyclopedia Britannica Online. Encyclopedia Britannica, n.d. Web. 12 Mar. 2014

  • Bohr

    Bohr
    Expanded on Rutherford's theory. Made the theory that electrons can only can only move in certain paths.
    "Niels Bohr." Niels Bohr. N.p., n.d. Web. 12 Mar. 2014

  • Heisenberg and Schrondinger

    Heisenberg and Schrondinger
    Found that there are fast moving electrons that create and elctron cloud. Also said you can't know the position an speed of an electron.
    "Development of the Atomic Theory." Development of the Atomic Theory. N.p., n.d. Web. 10 Mar. 2014