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元素周期表、元素周期律是化学基本理论中的重要内容,此知识点在历年各类高考试卷中都占较大的比重,且一些经典性问题也是反复考查的对象,但总有一些学生遇到相关问题时,出现“失荆州”、“走麦城”的现象.现就其中常见的易错问题分析如下,供复习参考.一、基础不牢例1下列事实不能作为实验判断依据的是A.钠和镁分别与冷水反应,判断金属活动
The Periodic Table of Elements and the Periodic Law of Elements are important contents in the basic theory of chemistry. This point of knowledge occupies a large proportion of all kinds of college entrance examination papers over the years, and some classic questions are also the objects of repeated examination. However, To the relevant issues, the emergence of “loss of Jingzhou ”, “go to the city of Mai.” Now one of the common error-prone analysis as follows, for review reference.First, the foundation is not strong Example 1 The following facts can not be used as an experiment Judgment is based on A. Sodium and magnesium were reacted with cold water to determine the metal activity