物质的量及摩尔的意义在国际单位制的七个基本单位中,有一个称为摩尔(mole,符号是mol)的单位,它是物理量“物质的量”(amount of substance)的单位.当一个系统所包含的基本单元(elementary entities)数和0.012kg的碳-12中所包含的原子数相同时,我们称这一系统的物质的量为1个摩尔.所谓系统的基本单元,对不同的具体问题,可以有不同的规定.它可以是原子,可以是分子,可以是离子,可以是电子,可以是光子或其他粒子,也可以是这些粒子的特定组合(group).特定组合中所包含 The amount of material and the meaning of the mole In the seven basic units of the International System of Units, there is a unit called mole, which is the symbol mol, which is the unit of the physical quantity “amount of substance”. When a system contains the same number of elementary entities as the number of atoms contained in 0.012 kg of carbon-12, we say that the amount of material in this system is one mole. The so-called basic units of the system, There can be different rules for different specific problems. It can be an atom, a molecule, an ion, an electron, a photon or other particle, or a specific combination of these particles. Included in