Between Group 2 and Group 6

• Ionic bonding


  Occurs when a metal reacts with a non-metal
• Electron transfer in ionic bonding between group two metals and group six non-metals

  1. Metal atom loses electrons in outer energy level

  2. Electrons transferred to non-metal atom

  3. Metal atom becomes positive ion

  4. Non-metal atom becomes negative ion

  5. Both ions have full outer energy level (stable electronic structure of noble gas)
• Ionic bonding


  • Group two metals lose two electrons forming two positive ion
  • Group six non-metals gain two electrons forming two negative ion
  • Both ions have full outer energy level (stable electronic structure of noble gas)
• In dot and cross diagrams, only the outer energy levels are shown as they are involved in the reaction