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一、问题的提出在义务教育课程标准实验教科书《化学》九年级(上册)第四单元“物质构成的奥秘”一章中,主要讲述的是原子的构成、元素、离子、化学式和化合价四个小节内容。对于学生来讲,掌握这部分内容十分重要,这是他们今后学习其他知识的基础。但这一章的内容非常抽象,远离学生的生活经验,且又无演示实验加以说明。另外,在普通高中课程标准实验教科书《化学》选修4第
First, the issue put forward in compulsory education curriculum standard experimental textbook “Chemistry” ninth grade (Volume) fourth unit “mysteries of matter ” chapter is mainly about the atomic composition, elements, ions, chemical formulas and valence Four sections. It is important for students to master this part of the content, which is the basis for their future learning of other knowledge. But the content of this chapter is very abstract, away from the student’s life experience, and no demonstration experiments to illustrate. In addition, in the ordinary high school curriculum standard experimental textbook “Chemistry” elective 4 paragraph