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一、明确学习目标1．理解分子、原子的含义及其基本特征．2．学会用分子、原子的观点区分物理变化和化学变化．3．能正确区分分子和原子．理解分子和原子的关系．二、理解基本概念1．分子：分子是保持物质化学性质的最小粒子．(1)分子只保持物质的化学性质,而不保持物质的物理性质．物质的物理性质(如颜色、熔点、沸点等)是大量分子的聚集体共同表现出来
First, a clear learning goal Understand the meaning of molecules and atoms and their basic characteristics. 2. Learn to distinguish between physical and chemical changes using the molecular and atomic viewpoints. 3. Can correctly distinguish between molecules and atoms. Understand the relationship between molecules and atoms. Second, understand the basic concepts Molecular: A molecule is the smallest particle that maintains the chemical nature of a substance. (1) The molecule only maintains the chemical nature of the substance, but does not preserve the physical properties of the substance. The physical properties of a substance (eg, color, melting point, boiling point, etc.) are manifested by aggregates of large numbers of molecules.