Chemical Formulas
 
Naming Chemical Formulas - This site provides a game where you have to match the compound name with the chemical formula.
 
Molecule Magic - more chemical formula and name matching, a little more challenging that the site above.
 
Balancing Chemical Equations
 

Review Chembalancer - This link will take you to a game that allows you to visualize the balancing of various chemical equations.
 
Sites for Balancing Equations 101 Worksheet -
        Chemical