Major introduction: Chemistry is a basic discipline that studies matter and its change process at the level of atoms, molecules and above. It is a creative central discipline that pays equal attention to theory and experiment and provides important information for humans to understand, transform and protect the world. Worldview and methodology. Chemistry has made great contributions to human survival and development through the research and production of chemical fertilizers, chemical fibers, medicines, pesticides, and materials, and the rational development and efficient use of energy and resources, and occupies a strategic supporting position in national construction and economic development. . The main subjects of chemistry include inorganic chemistry, organic chemistry, analytical chemistry, physical chemistry, structural chemistry, polymer chemistry, etc. The research content of chemistry covers the synthesis and reaction of substances, separation and purification, analysis and identification, properties and functions, structure and form, tailoring and assembly, etc. Today, when science is highly developed, chemists pay more attention to optimizing and regulating the functions of substances through simulation, design and controllable synthesis, and gradually advance chemical research from the atomic and molecular levels to the molecular aggregate level.
