atomic theory research

By rogersonwood
  • 460

    Democritus

    Democritus
    Location:greece
    Idea/experiment: Postulated the theory of Atoms and Void

    How this contributed to our understanding of the atom: Earliest idea of the atom, leading to modern atomic theory

  • Newton

    Newton
    Location: England

    Idea/exsperiment: Published Opticks, in which he expounded his corpuscular theory of light, defined laws of motion and gravity.
    How this contributed to our understanding of the atom: Defined the laws of physics

  • Dalton

    Dalton
    Location:England
    Idea/exsperiment:Published theory that was based on the premise that the atoms of different elements could be distinguished by differences in their weights.
    How this contributed to our understanding of the atom:Rationalised the various laws of chemical combination which were in existence at that time.

  • G.J Stoney

    G.J Stoney
    Location:Ireland
    Idea/exsperiment:Proposed that electricity was made of discrete negative particles he called electrons
    How this contributed to our understanding of the atom:First of the subatomic particles was realised.

  • Planck

    Planck
    Location: Germany
    Idea/exsperiment: Formulated Quantum Theory.How this contributed to our understanding of the atom: Used to measure all types of energy signatures by colour.

  • Nagaoka

    Nagaoka
    Location:Japan
    Idea/exsperiment:Postulated a " saturnian" atom model with flat rings of electronsrevolving about a positively charged particle.
    How this contributed to our understanding of the atom: The current model of the atom was developed.

  • Milikan

    Milikan
    location:USA
    Idea/exsperiment: Oil-drop exsperiment to determine the charge and mass of an electon.
    How did this contribute to our understanding of the atom: It was found that the electron had a negative charge.

  • E. Rutherford

    E. Rutherford
    Location:Britain
    idea/exsperiment: Published his atomic theory.
    How this contributed to our understanding of the atom: Contradicted Dalton's atomic theory which lead to the current atomic theory.

  • H.G.J Mosely

    H.G.J Mosely
    Location: England
    Idea/exsperiment: He found a relationship between an element's X-ray wavelength and its atopmic number.
    How this contributed to our understanding of the atom: Resequenced the periodic table by electronic charge rather that atomic weight which lead to the current periodic table.

  • Bohr

    Bohr
    Location: Denmark
    Idea/exsperiment: Investigated the structure of atoms and the radiation emancipating from them.
    How this contributed to our understanding of the atom: Concluded that an element positon on the periodic table should correspond to its atomic number of electrons rather than by atomic weight.

  • James Chadwick

    James Chadwick
    Location: England
    Idea/ esxsperiment: Discovered the neutron.
    How this contributed to our understanding of the atom: Comfirmed Rutherford's theory ath the atom was composed of almost entirely emty space.

  • J.J Thomson

    J.J Thomson
    location: england
    Idea/exsperiment: Using cathode ray tubes, he determined the existence of light particles that were the building blocks of the atom.
    How this contributed to our understanding of the atom: the electron was discovered.