Chemistry, often abbreviated as „Chemie“ in German, is the branch of science that studies the composition, structure, properties, and changes of matter. It involves the examination of substances, their interactions, and the energy transformations that occur during chemical reactions. Chemistry is fundamental to various scientific fields and plays a crucial role in understanding the natural world, from the molecular and atomic levels to macroscopic phenomena. It is often divided into several sub-disciplines, including organic chemistry (the study of carbon-containing compounds), inorganic chemistry (the study of inorganic compounds), physical chemistry (the study of the physical properties of molecules), analytical chemistry (the practice of analyzing material samples), and biochemistry (the study of chemical processes within and related to living organisms). Chemistry is integral to numerous applications in medicine, engineering, environmental science, and industry, facilitating advancements in technology and contributing to innovations that address societal challenges.