Democritus Abdera 460 - 370 BC

By jaj030
  • 300

    Aristotle Mid 300 BC

    Did not follow Democritius' theory and beleived in reasoning instead of scientific experimentation.
  • 460

    Democritius Abdera 460-370BC

    Atomic Theory revolved around atoms that are prresent in the atomosphere. Theory explains the esistance in atoms and its features. Attempted to create Materalism.
  • Antoine Lavoisier 1772

    Total Mass of a product of chemical reaction is always the same thing as the total mass.
  • Joseph Louis Proust 1798

    Created the Law of Constant Composition.
  • John Dalton 1799

    Atomic Model is one of the fundamentals of Physics and Chemistry.
  • J.J. Thompson

    Discovered that Cathode Rays are small streams of electrons observed in vacuum tubes.
  • Ernest Rutherford 1898

    Theorized that atoms have their positive charge concentrated in a very small nucleus. Also known for coining the terms of Alpha Ray and Beta Ray.
  • Robert Millikan 1911

    Worked on an Oil Drop experiment. This measured the charge on a single electron. He had already discovered the charge to mass ratio of the electron.
  • Niels Bohr 1913

    Introducted the theory of electrons traveling in orbits around the atom's nucleus. Considered the term of sationary orbits for the electrons in that there is more than one level of orbit.
  • Erwin Schrodinger 1881-1962

    Created the Schrodinger Wave Equation. Equation that describes how the quantum state of a physical system changes in time.