Physical chemistry is the study of how matter behaves on a molecular and atomic level and how chemical reactions occur. Based on their analyses, physical chemists may develop new theories, such as how complex structures are formed. Physical chemists often work closely with materials scientists to research and develop potential uses for new materials. Physical chemistry has traditionally given students broad training, and positioned them to work in a variety of scientific careers. Many people trained as physical chemists ultimately work as analytical chemists, where they work to understand the fundamental process involved in analytical techniques, allowing them to enhance and expand those techniques. Physical chemists’ discoveries are based on understanding chemical properties and describing their behavior using theories of physics and mathematical computations. Physical chemists predict properties and reactions of chemicals, then test and refine those predications.