Chemical Compounds complements U·X·L® 's award-winning Chemical Elements set by offering information on the ways in which different chemical elements combine to form commonly used chemical compounds, such as water, ammonia and aspirin. The four-color set starts with an overview in each volume that defines what a chemical compound actually is, including the difference between a mixture and a compound and the difference between organic and inorganic compounds. It also defines acids, bases, salts, oxides and coordination compounds. Chemical Compounds includes 180 entries on both organic and inorganic compounds and also features a general historical overview of major discoveries and the notable scientists who made them.