scientist

By madieg
  • 370

    Democritus

    Experiment: none.
    Discovery: indivisible particles.
    Atomic Model: the universe and all matter obey principles.

  • Dalton

    Discovery: built on atomic theory
    Experiment: various gasses and tests on their reactivity to each other to find different weights of atoms.
    Atomic Model: all matter is composed of very small things called atoms.

  • William Crookes

    Experiment: Crookes tube.
    Discovery: discovered thallium and discovered cathode rays.

  • Antoine Henri Becquerel

    Experiment: created a photographic plate that showed the effect of exposure to radioactivity.
    Discovery: radioactivity.
    Atomic model: nuclei break down and release these high energy particles called radioactivity.

  • JJ Thomson

    Experiment: Cathode ray tube experiment.
    Discovery: Electron.
    Atomic model: plum pudding model of the atom. discovery of the atomic nucleus in order to include the electron in the atomic model.

  • Marie Curie

    Experiment: mineral pitchblende.
    Discovery: radium and polonium.

  • R.A. Millikan

    Discovery: size of the charge on an atom.
    Experiment: oil drop experiment.
    Atomic Model: explained the structure of an atom.

  • Niels Bohr

    Discovery: Energy between atoms is only transmitted through well defined quantities.
    Experiment: Oscillating fluid jets to investigate surface tension.

  • Ernest Rutherford

    Discovery: proper structure of an atom.
    Experiment: Gold foil experiment. Bombarded a thin gold foil surrounded with a circular screen coated with zinc sulphide with a beam of alpha particles in vacuum.
    Atomic model: The model described the atom as a tiny, dense, positively charged core called a nucleus, in which nearly all the mass is concentrated, around which the light, negative constituents, called electrons, circulate at some distance.

  • Erwin Schrodinger

    Discovery: Schrodinger came up with a groundbreaking wave equation for electron movements.
    Experiment: He took the Bohr model and used mathematical equations to find likelihood of finding an electron in certain positions

  • James Chadwick

    Discovery: the Neutron in 1932 and in 1941 wrote a final book on the idea which led to government investigation into the atomic bomb
    Experiment: Chadwick took the Alpha Source and sent it through beryllium then through paraffin wax to separate protons and neutrons using radiation