论文部分内容阅读
前言现代自然科学的基石之一的元素周期律是化学元素性质的总结。元素周期律的现代定义是,化学元素的物理和化学性质是元素的原子序数的周期函数。就是说,如果把所有元素按照它们的原子序数依次排列,它们的性质就表现有规则的变迁(原子序数的函数),经过一定的间隔(周期)就出现相同的性质,重复相似的有规则的变迁。如此周而复始的变迁达七次之多。元素周期表是根据元素周期律把化学元素依照原子序数按周期和族类排列出来,以便于学习和应用。元素周期表有各种不同式样。我们编印的“元素周期表”(从略)采
Preface The elemental periodic law, one of the cornerstones of modern natural science, is a summary of the chemical elemental properties. The modern definition of the periodic law of elements is that the physical and chemical properties of a chemical element are periodic functions of the atomic number of the element. That is, if all the elements are arranged in order of their atomic numbers, their properties manifest a regular change (a function of atomic number), the same properties occur after a certain interval (period), and the similar regular change. So many changes have been made seven times. Periodic table is based on elements of the periodic table of chemical elements in accordance with the atomic number by cycle and family arranged in order to facilitate learning and application. The periodic table has a variety of different styles. We compiled the “periodic table” (omitted) mining