A chemist is a scientist trained in the science of chemistry. In the British Isles and some Commonwealth countries, chemist may also refer to a dispensing chemist, a pharmacist, or a general retailer of chemicals (usually for medicinal purposes).
Chemists study the composition of matter and its small-scale properties such as density and acidity instead of large-scale properties like size and shape. Chemists carefully describe the properties they study in terms of quantities, with detail on the level of molecules and their component atoms. Chemists carefully measure substance proportions, reaction rates, and other chemical properties. Chemists use this knowledge to learn the composition, structure, chemical reactivity, and properties of unfamiliar substances, as well as to reproduce and synthesize large quantities of useful naturally occurring substances and create new artificial substances and useful processes. Chemists may specialize in any number of subdisciplines of chemistry. Materials scientists and metallurgists share much of the same education and skills with chemists.

The Discovery Of Radioactivity:The Dawn of the Nuclear Age - Tells which scientists help discover radioactivity.
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