7.2 Ionic Bonds & Ionic Compounds

• Cation

  Positively charged ion
• Ionic bonds


  Electrostatic forces that hold ions together
• Octet


  Electron configuration of 2-8
• Formula Units


  Lowest whole number ratio of ions in an ionic compound
• Anion


  Negatively charged ion
• Stable


  Electron configuration of 2-8-8
• Ionic bonding diagram


  Diagram showing the ratio of ions in an ionic compound
• Ionic compounds


  Compounds formed from a electrically neutral Metal- nonmetal bond
• Sodium chloride

  • Sodium chloride crystals
• Ionic compounds


  • Form a crystallising structure, which are rigid and brittle
  • Solid