Types of structure: Bonding structure and the properties of matter: Chemistry: GCSE (9:1)

• Ion


  An atom or group of atoms that has lost or gained electrons and therefore a positive or negative charge.

  
• Polyatomic ion


  An ion that is made of more then one atom

  
• Metal ion


  an atom which has lost electrons forming a positive ion

  
• Non-metal ion


  an atom which has gained electrons forming negative ions.

  
• Covalent bond


  a shared pair of electrons

  
• Molecule


  two or more atoms held together by covalent bonds
• Metallic bonding

  Positively charged metal ions are surrounded by delocalised outer electrons

  
• Particles in an ionic compound

  Positive and negative ions

  
• Particle in a simple covalent substance

  Molecules
• Particles in a giant covalent substance

  Covalently bonded atoms

  
• Particles in a metallic substance

  Positive ions and delocalised electrons

  
• Electrostatic forces of attraction


  Strong forces of attraction between oppositely charged particles

  
• Elements that form ionic compounds

  Metals and non-metals together

  
• Elements that form covalent bonds

  non-metals

  
• Elements that form metallic bonds

  metals and alloys

  
• Alloy


  A metal mixed with other elements