Marcie Dionne

  • Aristotle
    367

    Aristotle

    He becomes a student at the Academy of Plato in Athens for 20 years and believes that matter can be broken into smaller pieces.
  • Democritus' theory
    400

    Democritus' theory

    He had a theory that natures basic particles were atoms.
  • Dalton's Atomic Theory

    Dalton's Atomic Theory

  • John Newlands Law of Octaves

    John Newlands Law of Octaves

    Newlands published his "Law of Octaves" which states that "any given element will exhibit analogues behavior to the eighth element following it in the table."
  • Mendeleev's Periodic table

    Mendeleev's Periodic table

    Mendeleev's periodic table was published.
  • Crooke

    Crooke

    Crooke invents the Crooke's Tube.
  • JJ Thomsons' demonstration

    JJ Thomsons' demonstration

    Thomson demonstrated that Hydrogen had only a single electron per atom.
  • Bohr's Atomic Model

    Bohr's Atomic Model

    Bohr invents his Atomic Model of the atom.
  • Ernest Rutherford "Split the nucleus"

    Ernest Rutherford "Split the nucleus"

    Rutherford was widely credited with first splitting the atom and leading the first experiment to "split the nucleus".
  • Chadwicks' discovery

    Chadwicks' discovery

    He discovers the unknown particle in the atomic nucleus..the neutron.