Charges on ions

• Non-metal ions


  Mostly negative
• Charge on metal ions

  Often the same as the group number in the periodic table
• Metal ions


  • Na+
  • Mg2+
  • Al3+
• Metal ions


  • Charge often the same as group number
  • Exceptions include transition metals which can form multiple ions
• Non-metal ions


  • O2-
  • F-
• Charge on non-metal ions

  Often related to group number in periodic table
• Non-metal ions consisting of multiple non-metal atoms

  Chemically combined
• If an exam question requires a non-metal ion, the formula will be provided