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元素是物质构成奥秘中的一个难点,为了突破,本文在设计思路的每一个环节上都紧紧围绕“元素”展开,在课堂时间分配上侧重突出“元素概念”。借助氢、碳的三种同位素,利用“原子构成图”把原子的内部结构与元素概念直观有机地结合起来,较好地突破了元素概念中“一类原子”这一教学瓶颈。
The element is a difficult point in the mystery of the material composition. In order to make a breakthrough, the article focuses on the “element” in every aspect of the design idea and focuses on the “element concept” in the distribution of the time in the classroom. With the help of the three isotopes of hydrogen and carbon, the internal structure of the atom is directly and organically integrated with the concept of elemental structure by means of “atomic structure diagram ”, which breaks through the bottleneck of “a kind of atom ” in the concept of element .