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Atomic TImeline (Plato 350 BCE ((Antione Lavoisior 1789 (John Dalton 1803…

- - - - John Dalton 1803
        
        JJ Thompson 1897
        
        Robert Millikan 1909
        
        Confirmed Thompson's hypothesis The mass of an electron is at least 1000 times smaller than the lightest atom.
        
        Sir Earnest Rutherford 1911
        
        Concluded atoms existed in mostly an empty space with most of the mass in the middle (the nucleus)
        
        Aimed a beam of beam of alpha particles at a gold foil to find the atoms acted as a thick net, some passed throuh while others didn't
        
        Measured the course of charged water to fing the charge of an electron
        
        Niels Bohr 1913
        
        Experimented with the viscosity of water and finite altitudes.
        
        Proposed the theory of the hydrogen atom
        
        Sir James Chadwick 1932
        
        Discovered the neutron (a neutrally charged particle)
        
        Use a polonium source and a Geiger counter to find this discovery
        
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        Erwin Shrodinger 1926
        
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        Created the theory of the Electron and that atoms were unit formally packed spheres of positive matter. Later he also discovered the Proton.
        
        e/m = -1.76 x 108 coulombs/g
        
        Used ray tubes to find out that electrons and protons existed in atoms
        
        Developed a thought that matter was composed of atoms that had different weights. Substances always broke down into the same elements in the same proportions.
        
        Studied and experimented with gasses to help him figure out that compounds always broke down the same elements.
      - Created law on Conservation Of Mass saying that Mass will stay consistent through all forms in a chemical reaction.
      - Experimenting with the burning process helped him come to this conclusion.
    - - Originated the thought saying that matter is made of smaller particles surrounded by empty space that may vary in size and shape.