Atom2 1

History of the Atom

By pris96
  • 400

    Democritus

    Passing/partial resemblance to the nineteenth-century understanding of atomic structure

  • Newtown

    Proposed a mechanical universe with small solid masses in motion

  • Dalton

    Proposed an "atomic theory" with spherical solid atoms based upon measurable properties of mass

  • G. J. Stoney

    introduced the concept of the electron

  • J. J. Thomson

    Discovered methods of separating the atom

  • Planck

    Founder of the quantum theory

  • Nagaoka

    Developed a rough atom structure

  • Millikan

    Determined the value of the charge of the electron

  • Rutherford

    Predicted that the neutron existed

  • G. J. Moseley

    Established that the nucleus is very small, very dense and positively charged

  • Bohr

    Arranged the Periodic Table in order of their atomic numbers

  • James Chadwick

    Discovered neutron existed