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Atom - Coggle Diagram

- - - - Substance → made of chemical elements
      - Atom → smallest unit
      - Elements → represented by chemical symbols
      - Substance types → pure / mixtures
    - - Nucleus
        
        Protons (+)
        
        Neutrons (0)
        
        Nucleons = protons + neutrons
      - Electron shells
        
        Electrons (–)
        
        Energy levels
    - - Atomic number = protons
      - Mass number = protons + neutrons
      - Isotopes
        
        Same protons
        
        Different neutrons
        
        Example: Carbon-12, Carbon-14