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本文采用以元素二次周期性与元素一次周期性相比较的方法,从原子结构入手对元素二次周期性的特征、产生的原因及定性的理论解释进行了分析。指出在说明元素性质时,不仅要考虑外层电子排布的影响,而且也要考虑内层电子排布的影响。只考虑外层电子的排布仅能得到一次周期性,只有同时考虑外层、内层电子的排布,才能得到二次周期性,乃至三次周期性等。
In this paper, the second periodicity of elements and the periodicity of elements are used to analyze the secondary periodicity of elements, the causes and the qualitative explanation of the elements from the atomic structure. It is pointed out that in describing the elemental properties, it is necessary to consider not only the influence of the outer electron arrangement but also the influence of the inner electron arrangement. Only consider the arrangement of outer electrons can only get a periodic, only consider the outer layer, the arrangement of the inner electron, in order to get the second periodic, or even three periodic and so on.