Found in air. Used to treat breathing problems A compound is a substance that contains atoms of two or more different elements, chemically joined together. For example, water is a compound of ...

A 19th-century medical dye is gaining attention for its potential cognitive benefits, sparking new research into its role in ...

Originally limited to the study of compounds produced by living organisms, organic chemistry has been broadened to include human-made substances (e.g., plastics ... and medicine. Examples of where you ...