Chemical Compound Facts



  • Compounds are substances that are made when the atoms of two or more different elements join together.
  • The properties of a compound are usually very different from those of the elements which it is made of.
  • Compounds are different from mixtures because the elements are joined together chemically. They can only be separated by a chemical reaction.
  • Every molecule of a compound is exactly the same combination of atoms.
  • The scientific name of a compound is usually a combination of the elements involved, although it might have a different common name.
  • Table salt is the chemical compound sodium chloride. Each molecule has one sodium and one chlorine atom.
  • The chemical formula of a compound summarizes which atoms a molecule is made of. The chemical formula for water is H 20 because each water molecule has two hydrogen (H) atoms and one oxygen (0) atom.
  • Table salt, or sodium chloride, forms when sodium Hydroxide neutralizes hydrocloric acid.
  • There only 100 or so elements but they can combine in different ways to form many millions of compounds.
  • The same combination of elements, such as carbon and hydrogen, can form many different compounds.
  • Compounds are either organic (see organic chemistry), which means they contain carbon atoms, or inorganic.