| The knowledge of element chemical compound is the basic knowledge of high school chemistry, it provides the concrete and perceptual understanding for the chemical experiments, basic chemistry concepts and theories. The chemical experiment is the lively reconstruction of the element chemical compound knowledge and Explore the laws of chemical reactions , the chemical calculation is quantitative research of the element chemical compound knowledge, Without the element chemical compound knowledge, the other knowledge of the chemistry just likes the water without a source. Also the element chemical compound knowledge is the basic knowledge which will be contacted, understood and used in the live by students.This paper chooses four versions of textbooks to do the vertical comparisons for inquiry about the trend of history of the element chemical compound knowledge in the textbook. The four versions are the northeast normal university press's textbook (1952), the textbook version of A, the full-time ordinary senior middle school textbook published by the People Education Press, and the ordinary standard experimental textbook published by the People Education Press. This paper also chooses two textbooks to do the horizontal comparisons for inquiry about the international trend of the element chemical compound knowledge; the one is the ordinary standard experimental textbook published by the Jiangsu People Education Press and another textbook is The Application of the Chemical Concept. From the comparisons, the organization characteristics of the element chemical compound knowledge is got.Nowadays, all country accord great importance to the curriculum research and reform of the elementary education. The textbook is the vector of the curriculum implementation; the curriculum reform is accompanied with the writing of the new textbooks. In this paper, the development trend of the knowledge of element chemical compound can provide specific recommendations.
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