I.Properties+of+Ionic+and+Covalent+Bonds

Chemical compounds are formed by the joining of two or more atoms. A stable compound occurs when the total energy of the combination has lower energy than the separated atoms.


 * Covalent bonds** are bonds in which one or more pairs of electrons are shared by two atoms.

http://hyperphysics.phy-astr.gsu.edu/hbase/chemical/bond.html
 * Ionic Bonds** are bonds in which one or more electrons from one atom are removed and attached to another atom, resulting in positive and negative ions which attract each other.

P**roperties of Ionic Compounds**:
-usually solid at room temperature and have high melting points -usually hard -usually do not conduct electricity as a solid -usually dissolve in water -usually conduct electricity when in solution or molten -many stong bonds between ions -many stong bonds between ions -ions can't move and are not willing to give away electrons

-simple molecular substances are gases, liquids or solids with low melting and boiling points -giant molecular substances have higher melting points -usually do not conduct electricity as a solid or when molten or in solution -usually do not dissolve in water -weak intermolecular bonds -many, many strong covalent bonds
 * Properties of Covalent Compounds:**