Ionic Compounds

• When metals react with non-metals electrons from the outer shell of the metal are transferred to the outer shell of the non-metal
• The ions that are made have full outer shells of electrons and carry a charge
• An example of ionic compounds

  
• positively charged ion – cation

  Negatively charged ion – anion
• Group 1 elements lose 1 electron and form ions

  with a +1 charge
• Group 2 elements lose 2 electrons and form ions with a +2 charge
• Group 7 elements gain 1 electron and form ions

  with a -1 charge

  Group 6 elements gain two electrons and form

  ions with a 2- charge
• Group 6 elements gain two electrons and form ions with a 2- charge
• More than one electron can be transferred

  Sometimes electrons are transferred to two different atoms e.g. MgCl2