Analytical Chemists and Chemical Compounds

This is effective because electrons within an atom can only exist at specific energy levels. Electrons move from low energy level to high energy level by absorbing electromagnetic radiation. When the electrons fall from a higher energy level to a lower energy level, the electrons also emit radiation. Electrons of each element emit and absorb radiation of a specific frequency, so even if other elements are present, a single element can be determined. AAS can measure trace amounts of elements such as parts per million (ppm), possibly even parts per million (ppb).

Chemists are scientists who study the properties of chemicals. They measure the effects of compounds in different situations and study chemical reactions. Chemists often work as members of larger research teams and are creating compounds useful for a variety of practical applications. Almost all industries benefit from theoretical and chemical compounds brought about by chemical science research. Chemists are also working to improve the quality of existing chemical products using advanced computer programs and to build new technologies in that field.

Chemists often use chemical compounds or compound molecular structures to represent chemical compounds. The number of synthesized (or isolated) compounds has increased dramatically and is reported in the scientific literature by specialized chemists worldwide. Many compounds can be obtained by chemically combining known chemical elements. As of May 2011, about 60 million compounds are known. The names of many of these compounds are so important that it is not easy to remember or to reference exactly. Besides, it is difficult to save those trajectories in the literature. International organizations such as IUPAC and CAS have begun to take measures to simplify these tasks. This information is generally summarized in a database called Chemical Index.