摩尔新定义和准确测定的阿伏伽德罗常数

针对2019年国际SI单位新标准的实施,依据文献对阿伏伽德罗常数和摩尔物质量原理进行了简短的历史回顾。着重于摩尔新定义的概念和准确测定阿伏伽德罗常数的描述,突出了原子量精密测量技术、纳米量级精密测量技术以及材料制备和表征技术的发展。相对而言,摩尔新定义更能体现科学方法和科学思维同化学知识的关系,将会对无机化学、分析化学、物理化学等课程教学引起巨大的冲击波,并且会波及到每个化学专业本科生。本文内容可为提高本科生的科研思维和科研素质提供借鉴。

New Definition of Mole and the Accurate Avogadro Constant

The new standard for international SI units was officially implemented this year and the definitions of the SI basic units, such as mole, will be changed to constants. In this paper, the Avogadro's constant and the principle of molar mass are briefly reviewed, and we focus on the concept of Mole's new definition and how to accurately measure Avogadro constant, as well as the development of atomic weight precision measurement, nano-scale precision measurement, materials preparation and characterization technologies. The new definition of Mole will affect every undergraduate of chemistry because it can better reflect the relationship between scientific methods and scientific thinking and chemical knowledge. It can be anticipated that the new definition of Mole will soon have a huge impact on the teaching of inorganic chemistry, analytical chemistry and physical chemistry. This recount is naturally important to improve the scientific thinking and research quality of undergraduates.