Water Molecule

Figure 1:  The Water Molecule

This is a picture of what a water molecule looks like if you looked at it through a very high power microscope.  You can see that there are two hydrogen atoms (the white parts) with one oxygen atom (the red part).  An atom is the smallest possible particle which still represents a chemical element.  An example of a chemical element is Hydrogen.  A hydrogen atom is the smallest particle possible that represents Hydrogen (that is, it has the correct weight, size and number of electron shells to make it Hydrogen).  When you have a glass of water or water comes out of the tap or you swim in the ocean it is millions and millions of these water molecules stuck together that you are drinking, seeing and swimming through.