Formula

• Simple molecular elements

  • H2 (hydrogen)
  • N2 (nitrogen)
  • O2 (oxygen
  • F2 (fluorine)
  • Cl2 (chlorine)
  • Br2 (bromine)
  • I2 (iodine)
  • P4 (phosphorus
  • S8 (sulfur)
• Simple Molecular compounds

  • CO2 (carbon dioxide)
  • CO (carbon monoxide)
  • NO (nitrogen monoxide)
  • NO2 (nitrogen dioxide)
  • SO2 (sulfur dioxide)
  • SO3 (sulfur trioxide)
  • NH3 (ammonia)
  • CH4 (methane)
  • H2S (hydrogen sulfide)
• Ionic compounds

  HCl (hydrochloric acid)

  H2SO4 (sulfuric acid)

  HNO3 (nitric acid)

  H3PO4 (phosphoric acid)
• Common negative ions (anions)

  NO3- (nitrate)

  SO42- (Sulfate)

  CO32- (Carbonate)

  HCO3- (hydrogen carbonate)

  OH- (hydroxide)

  H- (hydride)

  PO43-(phosphate)

  N3- (Nitride)

  HSO4- (hydrogen sulfate)
• Common positive ions

  Ag+ (silver)

  Zn+ (zinc)

  Pt+ (platinum)

  H+ (hydrogen)

  Ammonium (NH4+)