摘要
质量数和原子质量是中学化学中常见的两个基本概念,前者表示某核素原子核中质子数与中子数之和,后者表示某核素一个原子的质量;搞清两者的相对大小,对学习化学知识有很大的意义。
Mass numbers and atomic mass are fundemental concept in secondary chemisery. The former represents the sum of some certain unclern atomic nueleus and its neutron numbers;the latter represents the mass of some certain nuclein. It is of significance to the relative size be-tween the two in learning chcmical knowledge.
出处
《贵州教育学院学报》
2000年第2期87-89,共3页
Journal of Guizhou Educational College(Social Science Edition)
