AQA A Level Chemistry复习笔记1.4.7 Properties of Ionic Compounds

Ionic Lattice Structures

 

  • Most ionic, metallic and covalent solids are crystalline lattices
  • The ions, atoms or molecules are arranged in a regular and repeating arrangement

Giant ionic lattices

  • An ionic bond is an electrostatic force of attraction between a positively charged metal (cation) ion and a negatively charged non-metal (anion) ion
    • The metal becomes positively charged as it transfers electrons to the non-metal which then becomes negatively charged
    • When an ionic compound is formed, the attraction between the ions happens in all directions

     

  • Ionic compounds are arranged in giant ionic lattices (also called giant ionic structures)
  • The type of lattice formed depends on the sizes of the positive and negative ions which are arranged in an alternating fashion
    • The ionic lattice of MgO and NaCl are cubic

     

1.4.7-Ionic-lattices-of-the-ionic-compounds-NaCl-and-MgO

Ionic lattices of the ionic compounds NaCl and MgO

 

1.4-States-of-Matter-General-Ionic-Lattice

General ionic lattice which shows the actual packing of the ions

 

Exam Tip

It is important that you can state and fully explain the different properties which arise based on the structure and bonding present in a substance

 

 

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