Charges on Ions

• Metal ions are positive
• Most non-metal ions are negative
• Metals are on the left of the periodic table
• Ionic compounds are formed when metals react with non-metals
• Ions are atoms with a charge
• Metals form positive ions and most non-metals form negative ions
• The charge on a metal ion is often the same as it's group number on the periodic table
• Transition metals can from several ions. For example, iron, which can form iron (II) or iron (III)
• Non-metal ions can also be related to their group numbers.

  1. Group 6 - 2-
  2. Group 7 - 1-
• Some non-metal ions are positive:

  1. Hydrogen
  2. Ammonia