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2.1 Chemical Bonds, Ionic, Covalent and Metallic - Coggle Diagram

- - - - Metal forms positive ion, non metal forms negative ion
        
        Strong electrostatic forces between ions
        
        Forces act in all directions
- - - - Metallic bonds
- - - - Limitations of various diagrams
      - E.g. Dot and cross diagrams
      - E.g. Ball and stick diagrams