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Chemical development
May 21, 2018

Since the beginning of the 16th century, the rise of industrial production in Europe has promoted the establishment and development of medicinal chemistry and metallurgy chemistry, turning alchemy to life and practical application, and has paid more attention to the study of the changes in the material chemistry itself. After the establishment of the scientific concept of the element, the scientific oxidation theory and the law of conservation of mass were established through the precise experimental study of the combustion phenomena, and then the law of proportionality, the law of ratio, and the law of chemical composition were established to further the development of chemistry. Foundation.

Around 1775, Lavoisier used quantitative chemical experiments to elaborate the theory of combustion oxidation, and initiated a quantitative chemical period that allowed chemistry to develop along the correct track. At the beginning of the 19th century, British chemist Dalton proposed the theory of modern atoms, highlighting the basic characteristics of the atomic mass of various elements. The introduction of the concept of quantity is a major difference from the ancient atom theory. The modern atom theory gave a reasonable interpretation of the chemical knowledge and theory of the time and became a unified theory to explain chemical phenomena. Then Italian scientist Avogadro proposed the molecular concept. Since the study of chemistry using atom-molecule theory, chemistry has truly been established as a science. During this period, many basic laws of chemistry were established. The Russian chemist Mendeleev discovered the periodicity of elements, and the German chemists Liebig and Weiler developed the theory of organic structure. All these have made chemistry a systematic science and laid the foundation for the development of modern chemistry.