Helium, HEE lee uhm, is a lightweight gas and chemical element. Hydrogen is the only element that weighs less than helium. Helium is called an inert gas or noble gas. These terms are used because helium does not combine with other elements. More »
Acrylamide, uh KRIHL uh myd, is a white, odorless chemical that has a variety of industrial... More >>
Antifreeze is a substance that is added to a liquid to lower its freezing point. Antifreezes are... More >>
Calcium carbide, KAL see uhm KAHR byd, is a hard, brittle, crystalline compound made of calcium... More >>
Calcium carbonate, KAL see uhm KAHR buh nayt, is a white, crystalline mineral. It is widely... More >>
Carbon tetrachloride, teht ruh KLAWR eyed, is a clear, colorless liquid that does not burn.... More >>
Chlorofluorocarbon, klawr uh floor uh KAHR buhn, is any of a group of synthetic organic compounds... More >>
Chromic, KROH mihk, acid is the common name for chromium trioxide, an important industrial... More >>