Atomic Model

By rvm1996

  • Democritus 460 BC-370 BC

    Democritus 460 BC-370 BC
    Democritus proves that all matter is made up of atoms

  • Antoine Lavoisier 1743-1794

    Antoine Lavoisier 1743-1794
    Lavoisier came up with the Law of Conservation of Mass

  • Joesph Proust 1754-1826

    Joesph Proust 1754-1826
    Proust discovers that every pure chemical compound consists of elements in proportions.

  • John Dalton 1766-1844

    John Dalton 1766-1844
    Dalton came up with five assumptions to go along with is thoery, such as atoms being solid balls.
    You cannot change or destroy atoms.

  • JJ Thomson

    JJ Thomson
    Thomson comes up with the idea of the Plum Pudding Model. He also proved the idea of isoptopes being in a stable element.

  • Robert Milikan

    Robert Milikan
    He found the charge of an electron with an oil-dropped appartus.

  • Henri Becquerel 1852-1908

    Henri Becquerel 1852-1908
    Becquerel exposed uranium-bearing crystal to sunlight

  • Marie & Pierre Curie 1859-1934

    Marie & Pierre Curie 1859-1934
    They studed radioactivity and discovered polonium and rdium.

  • Ernest Rutherford

    Ernest Rutherford
    His planetary model led us to learn and understand the structure of an atom.

  • James Chadwick

    James Chadwick
    Chadwick worked with Rutherford and discovered the proton. Chadwick discovered the atomic number of an element was less than the atomic mass. Also, discovered the nuetron did exist and it is .1 percent more than a proton.