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分子是能够独立存在的物质的最小微粒,它不能再分为更小的微粒而不消失原物质的基本化学性质。从化学的观点来看,分子是由一个或多个互相结合的原子组成的。在同一分子中相邻两原子间的距离一定要比分别隶属于两个分子的相邻原子间的距离来得近些。分子式是表示分子的式子,它指出分子中原子的种类和数目,同时也表示一个分子或—个克分子
A molecule is the smallest particle of a substance that can stand alone, it can no longer be divided into smaller particles without undiminishing the basic chemical properties of the original substance. From a chemical point of view, a molecule consists of one or more atoms that bind to each other. The distance between two adjacent atoms in the same molecule must be closer than the distance between adjacent atoms that belong to two molecules respectively. Molecular formula is the expression of a molecule, which indicates the type and number of atoms in the molecule, but also a molecule or molecule