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Atomic model :recycle: - Coggle Diagram

- - - - Atom is the smallest particle.
      - It can't be divided.
    - - John Dalton
        
        Atoms cannot be created, further divided nor destroyed. Chemical reactions simply change the way atoms are grouped together.
        
        Atoms of one element are able to combine with atoms of other elements to form compounds. Compounds always have the same relative number of types of atoms.
        
        The atoms of a specific element are different from those of any other element, allowing scientists to distinguish elements from one another based on physical characteristics.
        
        All atoms of a specific element are the same.
        
        Elements are made of atoms.
      - 1808
        
        John Dalton
        
        Now called "Dalton’s Atomic Theory".
        
        Published the atomic theory in his book, “New System of Physical Chemistry”.
        
        1897
        
        Doctor J.J. Thomson
        
        Discovered the electron while working on cathode rays.
        
        Electrons are called subatomic particles.
        
        Electrons are the smallest of the subatomic particles and carry a negative electrical charge. They are distributed throughout the atom.
        
        1904
        
        Doctor J.J. Thomson
        
        Developed the “plum pudding” model to explain how electrons relate to an atom in a dynamic matter.
        
        1909
        
        Now
        
        We know
        
        2 more items...
        
        Dr. Ernest Rutherford
        
        His laboratory conducted an experiment based on Thomson’s results.
        
        Bombard a sheet of gold foil by helium ions.
        
        He disprove Thomson's theory.
        
        Atom surrounded by cloud of electrons, has a nucleus in it. Inside the nucleus is protons.