Iron sulfide, a new substance, has been formed because the iron and sulfur atoms are now chemically bonded together. The new substance is called a compound. Other compounds are made from different ...

Organic chemistry is the study of the structure, properties, composition, reactions, and preparation of carbon-containing compounds. Most organic compounds contain carbon and hydrogen, but they may ...

New research suggests a compound found in a wide variety of products — from cosmetics to air fresheners to detergents and ...

The chemical formula of a covalent molecular substance gives the number of atoms per molecule. The formula of a covalent network or ionic compound gives the simplest ratio of atoms/ions in the ...

Firefighters with increased exposure to certain chemical compounds are more likely to develop gliomas -- the most common type ...