Professional direction according to their own interests. The better directions are inorganic chemistry, analytical chemistry, organic chemistry, physical chemistry and polymer chemistry and physics.
If the word "chemistry" is interpreted literally, it is "the science of change". Chemistry, like physics, is a basic science of natural science and a subject based on experiments. It develops rapidly with the mutual penetration of physics, biology, geography, astronomy and other disciplines, and also promotes the development of other disciplines and technologies. For example, the research results of nucleic acid chemistry have raised today's biology from the cellular level to the molecular level and established molecular biology.
Some of its main courses are:
1. Inorganic chemistry: elemental chemistry, inorganic synthetic chemistry, inorganic polymer chemistry, inorganic solid chemistry, coordination chemistry (i.e. complex chemistry), isotope chemistry, bioinorganic chemistry, organometallic chemistry, metalloenzyme chemistry, etc.
2. Organic chemistry: general organic chemistry, organic synthetic chemistry, metal and nonmetal organic chemistry, physical organic chemistry, bioorganic chemistry and organic analytical chemistry.
3. Physical chemistry: structural chemistry, thermochemistry, chemical thermodynamics, chemical kinetics, electrochemistry, solution theory, interface chemistry, colloid chemistry, quantum chemistry, catalysis and its theory.
4. Analytical chemistry: chemical analysis, instrument and new technology analysis. Including performance measurement, monitoring, various spectral and photochemical analysis, various electrochemical analysis methods, mass spectrometry, various electron microscopes, imaging and morphology analysis methods, online analysis, activity analysis, real-time analysis and so on. Various detection methods of physical and chemical properties and physiological activities, separation methods such as extraction, ion exchange, chromatography and mass spectrometry, combined separation analysis, combined synthesis and separation analysis, etc.
5. Polymer chemistry: natural polymer chemistry, polymer synthetic chemistry, polymer physical chemistry, polymer application and polymer physics.
6. Nuclear chemistry: radioactive element chemistry, radioanalytical chemistry, radiochemistry, isotope chemistry and nuclear chemistry.
7. Biochemistry: general biochemistry, enzymes, microbial chemistry, phytochemistry, immunochemistry, fermentation and bioengineering, food chemistry, coal chemistry, etc.
Other frontier disciplines related to chemistry include geochemistry, marine chemistry, atmospheric chemistry, environmental chemistry, cosmic chemistry, interstellar chemistry and so on.