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Atom - Coggle Diagram

- - - - placed polonium in a vacuum-sealed box
        
        radiated alpha particles through a piece of beryllium causing the acceleration of unknown radiation
        
        He identified the unknown radiation to be neutrally charged particles, calling them “neutrons”
  - - - consisted of building blocks called "atoms"
        
        Different elements differ in size and mass
        
        meaning, if you combine elements, atoms of each elements will remain and you will create a compound
        
        a single element's atoms are always the same
      - Indivisible
      - Indestructible
  - - - Planetary Model
        
        negatively charged electron orbits a small positively charged nucleus just like how the planets orbit in the sun
        
        the electron orbits in the nucleus, it does not radiate energy, rather, it exist in states of constant energy called stationary states
        
        meaning, the orbit of electrons are at a fixed distance from the nucleus.
  - - - Fired Alpha particles to a thin sheet of gold foil
        
        alpha particles hardly deflected and passed through
        
        Mass of an atom is concentrated to its "nucleus"
        
        nucleus -> made up of tightly bonded positively & neutrally charged subatomic particles
  - - - particles consisted
        of small spheres (pudding) and its volume had a positive charge spread uniformly through it and there were negative charges (plum) as the point charges.
- - - - Corpuscles
        
        Discovered the negatively charged subatomic particle or the electrons
  - - - Discovered that atoms have the nucleus
  - - - Electrons travel in different orbits around the nucleus
        
        The number of electrons in the outer orbit determines the properties of an element
  - - - Discovered Neutrons in atoms
        
        Have neither positive nor negative charge
        
        Neutrons were found to have the same mass as protons
        
        Discovered by using a neutron chamber in his experiments
- - - - Boyle - The Sceptical Chymist
      - 1803
        
        1897
        
        1920
        
        James Chadwick
        
        Ernest Rutherford
        
        Discovery of Protons
        
        Discovery of Neutrons
        
        Discovered Electrons through cathode ray tubes
        
        JJ Thompson
        
        John Dalton
        
        – Atoms of different elements have different masses and size
        
        Atoms of the same element have a fixed mass and size.
- - - - Concept of an indivisible matter.
    - - Atoms differed in size and shape
      - Theory of atomism
        
        Atomos = Indivisible
        
        It is an individual and it cannot be divided further
        
        World emerged from a vertex of atoms
        
        Gave birth to the earth or our world
        
        Another world is formed
        
        Multiverse Theory
        
        3 more items...
      - The world is a congregation of atoms
      - Introduced particles as elements of everything that is a combination of atoms