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在东北本高中化学第一章讲完盐及其制法之后,第二章即开始讲到卤素。在它的本文上已经明确指出它的用意的所在。现在把我个人所见到的地方提出来供读者参考,并请指正。1.在本章开始即谈到“在已经知道了制造各种化合物的一般方法后,即开始研究各种元素及其化合物的性质、相互关系、相似点、和相异点”。在本章最末后一节又谈到“以后研究各种物质时,将要有系统的研究各族元素中最主要的元素和它们的化合物,并指出该族中其他元素与主要元素间的相似点,和相异点”。
After the first chapter of the Chemistry of Northeast High School finished salt and its preparation, the second chapter began to talk about halogen. It has clearly pointed out in its article of its intention. Now put my personal place to see for readers reference, and please correct me. 1. Beginning with this chapter, it is stated that “once the general method of making a variety of compounds is known, we begin to study the nature, interrelationships, similarities, and differences of the various elements and their compounds.” In the last section of this chapter, we also talk about “When we study various substances in the future, we will systematically study the most important elements and their compounds in the various ethnic groups and point out the similarities between other elements in this family and the major elements, And differences. ”