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在“铁和铁的化合物”的教学中,我们抓住铁在元素周期表中的位置和它的原子结构这一关键,着重分析铁在化学反应中变成亚铁离子还是铁离子,加强新旧联系,运用由浅入深地进行相互对比的方法,并配合有关的演示实验,将具体而分散的知识,感性知识和理性知识有机地结合起来。这样,使学生学得比较灵活和扎实,收到了预期的效果。现将点滴体会介绍于后:
In the teaching of “iron and iron compounds”, we grasped the key position of iron in the periodic table of elements and its atomic structure, focusing on the analysis of whether iron becomes a ferrous or iron ion in chemical reactions, strengthening the old and the new. Contact, use the method of contrasting from shallow to deep, and cooperate with the relevant demonstration experiment to organically combine specific and dispersed knowledge, perceptual knowledge and rational knowledge. In this way, students learn more flexibly and solidly and receive the desired results. Now we will introduce some experiences later: