Atomic Theory

Timeline created by del2787
  • 470

    Democritus

    (470 B.C.)
    Credited with inventing the concept of the atom.
  • Antoine Lavoisier

    (1743-1794)
    First to look at the elements collectively.
  • John Dolton

    (1766-1844)
    Created atomic theory.
  • Law of conservation of mass

    Mass is neither created or destroyed.
  • Daltons atomic theory

    Atoms in different elements have different wieghts.
  • Dmtri Mendeleev

    (1834-1907)
    Created first periodic table.
  • Neils Bohr

    (1885-1962)
    developed the explaination of the atomic structure.
  • J.J. Thomson

    (1856-1940)
    Discovered the electron, first to suggest the atom was spherical.
  • Robert Millikan

    (1868-1953)
    determined the electronic charge of an element.
  • Ernest Rutherford

    (1871-1937)
    Described the atom as having a nucleus surrounded by orbitting electrons.
  • Erwin Schrodinger

    (1887-1961)
    electrons aren't distributed but are orbital.
  • Henry Mosley

    (1887-1915)
    developed the application of x-rays to study atomic structure.
  • James Chadwick

    (1891-1974)
    Proved the existence of nuetrons.
  • Cathode ray tube

    Created by Ferdinand Bruan
  • Plum pudding model

    Created by J.J. Thomson.
  • Gold foil experiment

    expiremented by Ernest Rutherford
  • Electron cloud model

    shows the probable locations of an atom
  • Rutherford atomic model

    All of the positive charges are crammed into the nucleus, all the others lay outside of the nucleus.
  • Bohr planetary model

    protons and nuetrons are densly compacted in a nucleus.
  • Quantum Mechanical model

    Created by Erwin Schrodinger,, shows that electrons don't have set orbits but have random motions.