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化学是一门研究物质的组成、结构、性质以及变化规律的基础自然科学。对于化学研究的内容与范围,同学们要在一学年的初中化学学习中逐步体会。本文仅就“物质的组成与构成”的知识点进行说明与归纳。 我们知道,化学研究物质要从宏观与微观两个角度进行。“物质的组成”是从宏观角度研究物质,研究的内容包括: 1.被研究物质是由一种物质组成的纯净物,还是由多种保持各自性质的物质组成的混合物?
Chemistry is a basic science that studies the composition, structure, properties, and laws of change. With regard to the content and scope of chemical research, students should gradually realize the chemistry learning in junior high school during the academic year. This article only describes and summarizes the knowledge points of “the composition and composition of matter”. We know that chemical research substances should be conducted from both macroscopic and microscopic perspectives. The “composition of matter” is a study of matter from a macro perspective. The contents of the study include: 1. Is the substance being studied a pure substance consisting of one substance or a mixture of several substances that retain their respective properties?