Chemistry Main article: Chemical Structural formula of the molecule of caffeine. Constitutes the scientific study of matter at atomic and molecular chemistry is mainly concerned supraat micas groups, such as gases, molecules, crystals and metals, studying composition, statistical properties, transformations and reactions. Chemistry also involves understanding the properties and interactions of matter at the atomic scale. New york . Most chemical processes can be studied directly in the laboratory using a series of often well-established techniques, both material handling and understanding of the underlying processes. An alternative approach is provided by molecular modeling techniques, which draw conclusions from computer models. Chemistry is often called “central science” for his role in connection with the other natural sciences.The chemistry experiment is an outgrowth of alchemy, a belief system that combined esotericism and physical experimentation. The science of chemistry began to develop in the late eighteenth century, scientists working with such notables as Robert Boyle, the discoverer of gases, or Antoine Lavoisier, who discovered the Law of Conservation of Mass. The systematization became apparent with the discovery of the Periodic Table of the Elements and the introduction of the atomic theory, when the researchers developed a fundamental understanding of the states of matter, ions, chemical bonds and chemical reactions. From the first half of the nineteenth century, the development of chemistry brings with the emergence and spread of chemical industry of great importance in the economy and quality of living.