In ionic compounds the total charge of the positive ions is balanced by the total charge of the negative ions.

  1. write down the formula of the metal ion
  2. write down the formula of the negative ion
  3. if the charge is unbalanced add another ion of the opposite charge.
  4. repeat until charges balance

Watch the video to see how this works.

When you master this skill you are well on your way to becoming a chemistry geek!. Good luck

……………. and final finally……… a mars bar to the first person who can identify the video music.

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