学生能否牢固地、准确地、哪怕只是定性地建立起基本的化学观念,应当是中学化学教学的第一目标。化学作为一门自然科学,研究的是物质的组成、结构、性质以及变化规律,而物质的性质是由结构决定的,性质又决定了物质的制备、用途和存在。物质的性质要受到组成的影响,对于简单的化 Whether students can firmly, accurately, or even qualitatively establish basic chemical concepts should be the first goal of chemistry teaching in middle schools. As a natural science, chemistry studies the composition, structure, properties, and law of change of matter. The nature of matter is determined by the structure, and the nature determines the preparation, use, and existence of matter. The nature of the material is affected by the composition, for simplicity