Molecular Ions

• Molecular ions, or compound ions join together and plus an extra electron, or missing electron.
• Hydroxide = OH

  Nitrate = NO3

  Carbonate = CO32-

  Sulfate = SO42-

  Phosphate = PO43-

  Ammonium = NH4+
• If it ends in -ate, there is oxygen in the ion.
• When naming an ionic compound, the metal always comes first and the name of the non-metal second:

  Nonmetal ending changes to ide

  Oxygen - oxide

  Nitrogen - nitride

   

  Sodium + chlorine - sodium chloride

  Lithium + bromine - lithium bromide

  Potassium + iodine - potassium iodine

  Sodium + hydrogen + oxygen - sodium hydroxide

  Zinc + carbon + oxygen - zinc carbonate

  Potassium + chlorine + oxygen - potassium chlorate

  Sodium + phosphate + oxygen - sodium phosphate
• Oxygen makes it end in -ate, except for when with hydrogen
• Formula of an ionic compound:

  Calcium Chloride  -

  1)Write atoms – Ca, Cl

  2)Write ion – Ca2+, Cl1-

  3)Swap and Drop – Ca1+, Cl2-

  4)Simplify – CaCl2