structure and bonding

• Electrons


  Exist in energy levels or shells
• Maximum electrons in energy levels

  • First energy level: 2
  • Second energy level: 8
  • Third energy level: 8
• Noble gases


  • Have a full outer energy level
  • Are unreactive
• Ionic bonding


  Occurs when a metal reacts with a non-metal
• Ionic bonding between lithium and fluorine

  1. Lithium atom loses outer electron

  2. Fluorine atom gains electron

  3. Both atoms achieve full outer energy level
• Ionic bonding between sodium and chlorine

  1. 1 electron passes from sodium atom to chlorine atom

  2. Both atoms achieve full outer energy level
• what happens during ionic bonding with group 1 metals and group 7 non metals

  group 1 metals lose one electron forming a one positive ion and group 7 gain 1 electorn forming a 1 negative ion both ions have a fll outer energy level