History of the Atom Timeline by Cheyenne and Christian

By queenB145
  • 400

    Democritus

    Democritus
    Democritus believed the atom was unable to be broken down into smaller pieces. He did experiment by breaking up a seashell."What Democritus Thought." Democritus Model. N.p., n.d. Web. 23 Feb. 2015.

  • Dalton

    Dalton
    Could combine elements to form compounds only in fixed porportions according to mass. Theory varying properties of the atoms."John Dalton's Atomic Model." Universe Today. N.p., 01 Dec. 2014. Web. 20 Feb. 2015.

  • Thomson

    Thomson
    Thomson was also the first to seperate is of the chemical elements."Plum Pudding" the electrons and protons are uniformly mixed throughout the atom.

  • Bohr

    Bohr
    He discovered that elements moved around a postitivly charged nucleus."World Book Online Reference Center | Online Reference Book| Online Encyclopedia." World Book. N.p., n.d. Web. 25 Feb. 2015.

  • Rutherford

    Rutherford
    First person to break up the ncleus of an atom. Many contrubutions to science. Rutherford theorized that atoms are constructed much life the solar system."Plum Pudding" the electrons and protons are uniformly mixed throughout the atom."Rutherford Model of the Atom." Rutherford Model of the Atom. N.p., n.d. Web. 23 Feb. 2015.

  • Heisenberg And Schrodinger

    Heisenberg And Schrodinger
    The Quantum Theory. Schrodinger Equation. Based on the Covis V.de Broglie. World Book Online Reference Center | Online Reference Book| Online Encyclopedia." World Book. N.p., n.d. Web. 25 Feb. 2015.