History of the Atom Timeline by Mekiah wells Kristain Jackson

By 2018
  • 100

    Democritus

    Democritus
    Democritus imagined the atom were so small that it was hard to see the particels. He also saidthe atoms were "uncuttable". "these atoms physically but not geometrically indivisible. He made this discovery through theories that everything was made up of atoms. He believd that the atoms had different sizes and shapes. " the iron atoms had hooks thats why they were so strong
    staffman|, Mark. "World Book Online Reference Center | Online Reference Book| Online Encyclopedia." World Book. Web. 24 Feb.

  • Dalton

    Dalton
    Dalton said each chemical element is compsed of its own kind of atoms all the same weight. He found this from a series of experimentsand theroies. he believed they combined by their atomic weight all having about the same weight.
    Willams, Matt. "John Dalton's Atomic Model." Universe Today. N.p., 01 Dec. 2014. Web. 20 Feb. 2015.

  • Thomson

    Thomson
    Thomson discovered that atoms were in fact "cuttable" meaning they are able to be cut. He made his discovery by studying the rays that travle between charged metal plates in a vacum tube. Thomson said it "shows the electrons embedded in a positively charged sphere like seeds in a watermelon"
    staffman|, Mark. "World Book Online Reference Center | Online Reference Book| Online Encyclopedia." World Book. Web. 24 Feb.

  • Rutherford

    Rutherford
    Rutherford discoverd the nucleus of the atom.The method that he used to make his discovery was that he bombarded thin sheets of gold with alpha particles.Rutherford thought the atom was a nucleus surrounded by electrons traveling at tremendous speeds through the atom's outer regions.Mark, Saffman. "Atoms." World Book. N.p., n.d. Web. 20 Feb. 2015.

  • Bohr

    Bohr
    Bohr discovered the motion of electrons in atoms.The method he used was the attractive force is actually much stronger the gravitational attractions.Bohr thought the atom that there was outer orbits and inner orbits.Stanley, Matthew. "Bohr, Niels." World Book Advanced. World Book, 2015. Web. 26 Feb. 2015.

  • Heisenberg and Schrodinger

    Heisenberg and Schrodinger
    Heisenberg and Schrodinger both discovered that the electrons are waves.The methods that they used was quantum physics and two-slit experiment.Allain, Rhett. "The Development of the Atomic Model." Dot Physics. N.p., 2006. Web. 26 Feb. 2015