chemistry chemicals chemist chemical man

A chemist from Medieval Latin alchemists is a scientist trained in the study of chemistry. Chemists study the composition of matter and its properties. 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. The word 'chemist' is also used to address Pharmacists in Commonwealth English.

Chemists use this knowledge to learn the composition, 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 work of chemists is often related to the work of chemical engineers, who are primarily concerned with the proper design, construction, and evaluation of the most cost-effective large-scale chemical plants and work closely with industrial chemists on the development of new processes and methods for the commercial-scale manufacture of chemicals and related products.

All the above major areas of chemistry employ chemists. Other fields where chemical degrees are useful include astrochemistry (and cosmochemistry), 

atmospheric chemistry,

chemical engineering, 

chemo-informatics, 
electrochemistry, 
environmental science,
 forensic science,
 geochemistry,
 green chemistry,
 history of chemistry, 
materials science, 
medical science,
 molecular biology, 
molecular genetics, 
nanotechnology, 
nuclear chemistry,
 enology, 
organometallic chemistry, 
petrochemistry, 
pharmacology, 
photochemistry, 
phytochemistry, 
polymer chemistry, 
supramolecular chemistry 
surface chemistry.