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成功的学习者往往会特别留心那些不能根据一般规律类推的特殊知识点.为了加深理解,帮助同学们矫正“以偏概全”的错误.现将《氮和磷》一章中的一般与特殊归如下(括号内为反例).1.一种元素组成的物质不可能是混和物.(白磷和红磷;O_2和O_3)2.能与水作用生成酸的氧化物都是酸酐.(NO_2)3.非金属原子间不可能形成离子化合物.(NH_4Cl)
Successful learners tend to pay special attention to those special knowledge points that cannot be deduced from the general laws. In order to deepen understanding, help the students to correct the mistakes of “appropriateness”. Now the general and special aspects of the chapter “Nitrogen and Phosphorus” (Refer to the back example in parentheses) 1. A substance consisting of one element cannot be a mixture. (white phosphorus and red phosphorus; O_2 and O_3) 2. The oxides that react with water to generate acid are anhydrides. (NO_2 3. It is impossible to form ionic compounds between nonmetal atoms. (NH_4Cl)