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Periodic table - Coggle Diagram

- - - - Johann Döbereiner - 1829
        
        Observed that some elements had similar properties
        
        1860
        
        German Conference decided that Hydrogen has an atomic number of 1, and all elements would be scaled against it
        
        John Newlands - 1865
        
        First person order elements in table in order of atomic mass
        
        Law of octaves
        
        eighth element had similar properties; arranged in octaves
        
        only worked for first 20 elements
        
        Dimitri Mendeleev - 1869
        
        Arranged P.Table by A.Number
        
        Left gaps for undiscoverd elements
        
        Left spaces for then-undiscovered elements
        
        1 more item...
        
        Rearrange elements that did not fit
        
        Created modern P.Table framework
        
        Lothar Meyer - 1970
        
        Made P.Table similar to Mendeleev.
        
        Henry Mosely -1913
        
        2 more items...
        
        Did not attempt to predict missing elements
        
        Arranged elemnts in triads in order of atomic weight
      - Tried to organise elements into metals and non-metals
  - - - Thought they were solids balls with diffrent types
      - J.J. Thompson - 1904
        
        Thought that Atom was positve, with negative electrons embedded in it
        
        Discovered electron.
        
        Ernest Ruherford - 1911
        
        "Discovered" Nucleus
        
        (Gold leaf / Alpha Particle) scattering experiment
        
        Niels Bohr - 1914
        
        Erwin Schrödinger - 1926
        
        James Chadwick - 1932
        
        Came up the idea of neutrous; allows isotops to exist
        
        Stated that electrons move in a cloud around nuceus
        
        Impossible to fing exact location of electron
        
        Came up with the idea of energy levels, or shells
        
        Plum Pudding model
- - - - Non-metals -- Right side
      - Metals -- exetreme left side