You know the common chemical formulas, such as H2O, HCl, NaCl, NaOH, CH4 or C2H5OH ? Select the elements forming these patterns and many others from the array according to the correct order and make the best score! The game contains a database of 1366 compounds: oxides, acids, hydroxides, hydrides, hydrocarbons, complexes, salts, etc. The longer the chemical formula you create, the more points you gain and the time.