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+
• Transition metals can form several different ions
• Transition metal ions

  • Fe2+
  • Fe3+
  • Cu1+
  • Cu2+
• Charge on non-metal ions

  Related to group number in periodic table
• Non-metal ions

  • O2-
  • S2-
  • F-
  • Cl-
  • Br-
• Some non-metal ions consist of several non-metal atoms chemically combined
• Ionic compounds

  • Na2SO4
  • Ca(OH)2