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Interactions and relationships provide evidence for the emergence of new…

- - - - Ionic
      - Covalent
      - Metallic
    - - Industrial
      - Environmental
      - Biological
- - - - Chemical Bonding
      - Energy Change
  - - - Measurable Data
        
        Example : pH change , Temperature change , etc...
      - Observable Data
        
        Colour change , State of matter
- - - - Unique usages
      - Unique structure & properties