Atoms Timeline

By daylin.tierra
  • 460

    Democritus

    Democritus
    Democtitus suggested atom in 460 BC after many observations.
    Coffey, Jerry. "Democritus Atom." Universe Today. N.p., 22 Mar. 2010. Web. 19 Feb. 2015.

  • Dalton

    Dalton
    Dalton stated in 1803 in all matter is made up of atoms .atoms are invisvisible and destuctible. Also he stated all atoms of a given element are identical in mass and properties. He used experimens
    Williams, Matt. "John Dalton's Atomic Model." Universe Today. N.p., 01 Dec. 2014. Web. 20 Feb. 2015.

  • Bohr

    Bohr
    Bohr said that electrons travelled in a circular orit with specific energy levels ,he used mathematical models .
    Benett, Linda. "What Bohr Discovered." Bohr's Model. N.p., 2012. Web. 25 Feb. 2015.

  • Thomson

    Thomson
    Thomson said , in 1911 , that electrons and protons are mixed together in the atom. He called it the Plum Pudding model.
    Leon, Prof N De. "Rutherford Model of the Atom." Rutherford Model of the Atom. N.p., n.d. Web. 19 Feb. 2015.

  • Rutherford

    Rutherford
    In 1913, Rutherford developed the Planetary modle of the atom that said all protons in the nucleus and all electrons orbited around the nucleus.
    Leon, Prof N De. "Rutherford Model of the Atom." Rutherford Model of the Atom. N.p., n.d. Web. 19 Feb. 2015.

  • Heisenberg and Schrodiger

    Heisenberg and Schrodiger
    Heisenberg and Schrodiger said in 1926 electon is a wave and tries to decribe the reactions in space ,orbitals ,where elctrons are most likely found. "World Book Online Reference Center | Online Reference Book| Online Encyclopedia." World Book. N.p., n.d. Web. 25 Feb. 2015.