Everyone knows that water is H2O, but what exactly does that mean? H2O is a compound. A compound is a group of two or more elements bonded together. Compounds are everywhere. Things that you use everyday are compounds that you didn't even know about. NaCl is a compound called sodium chloride or salt. CH3COOH is the formula for a compound known as vinegar. Compounds are interesting things. It is cool how elements can chemically bonded to create a completely new thing that is completely different than what you started with.
To learn more about compounds:
http://www.chem4kids.com/files/atom_compounds.html
