元素的金属性及其在周期系中的变化规律,是中学和大学无机化学教学中都经常遇到的问题。过去在一些教科书中对此问题大都只是描述性的定性讨论,有的虽也作过一些定量的比较,但还存在着不够明确的地方。随着化学科学的发展,无机化学的许多概念日益有从描述向推理,从定性向定量发展的趋势,因此作者认为目前在定量讨论元素 The metallic nature of the elements and their changing rules in the periodic system are common problems in the teaching of inorganic chemistry in middle schools and universities. In the past, in some textbooks, this issue was mostly a descriptive qualitative discussion, and although some quantitative comparisons have been made, there are still some areas that are not clear enough. With the development of chemical science, many concepts of inorganic chemistry are increasingly trending from description to reasoning, from qualitative to quantitative. Therefore, the author believes that the elements are currently discussed quantitatively.