• 367


    Becomes a student and believes that matter can be broken into smaller pieces.
  • 400

    Democritus' theory

    Democritus' theory
    A theory that natures basic particles were atom
  • Dalton's Atomic Theory

    Dalton's Atomic Theory
    Discovered all matter is made of atoms. Atoms are indivisible and indestructible.
  • 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's tube

    Crooke's tube
    Crooke invents the Crooke's Tube.
  • JJ Thomsons' Electron

    JJ Thomsons' Electron
    Discovery of the electron and of isotopes,
  • Bohr's Atomic Model

    Bohr's Atomic Model
    Bohr invents his Atomic Model of the atom
  • "Split the nucleus"

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

    Chadwicks' discovery of the neutron
    Discovers the non electrical particle in the atomic nucleus a neutron.