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When many of us think about chemistry we imagine mad scientists surrounded by bubbling vials of colored liquids, an image not too far removed from the idea of a witch’s cauldron and its magical brew. Of course, today’s chemists are scientists who do much more than mix together weird liquids to see which explode. However, there was a time when that stereotype wasn’t too far from the truth.
Modern chemistry grew out of the medieval practice of alchemy, which sought to change metals like silver or mercury into gold. Though we now know that the only way to make an element change into another is by adding or extracting protons from an atom’s nucleus, the experiments of alchemists like Paracelsus (1493-1541) helped early chemistry grow. Paracelsus, for example, was the first to discover that “the dose makes the poison,” an important contribution to the related field of toxicology. Today, modern chemists often work at the atomic level rather than with the potions, vials, and brews of early practitioners.
Chemistry is divided into two major fields of study, inorganic and organic chemistry. Organic chemistry deals with compounds of carbon and hydrogen while inorganic chemistry covers everything else. Carbon compounds are unique for a couple of reasons; first, because they can form lengthy and rings and more importantly because they are the basis for life on earth. All living creatures are made up of carbon compounds, which is why we often say that life on earth is “carbon-based.”
In both inorganic and organic chemistry, a vast number of chemical reactions occur, and the chemist’s job is to understand and harness them. The most important principle involved in the study of chemistry is the law of the conservation of mass, which holds that during a chemical reaction there is no change in the amount of mass present. In other words, when the reaction between hydrogen and oxygen occurs to produce water, there is still the same amount of hydrogen and oxygen as when you began. This dovetails nicely (and is in fact derived from) the principle of physics that energy (which is interchangeable with mass) is conserved.
Chemistry is an exciting and versatile field with solid job prospects. Students who gradate with degrees in chemistry have a wide range of career options. They can be anesthesiologists, ballistics experts, crime lab analysts, doctors, food and drug inspectors, lab assistants, pathologists, soil scientists, technologists, and more [1].
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[1] “Chemistry Careers,” Ball State University Department of Chemistry, 2004, <http://www.bsu.edu/csh/chemistry/careers.html> (19 September 2006).
