中文摘要：

采用电子定域函数（ELF）方法对第一到第四周期主族元素的壳层结构进行了研究。计算得到了各壳层半径及壳层内的电荷数，探讨了原子序数与壳层半径间的关系。结果有助于学生更好地理解原子的壳层结构。

英文摘要：

The atomic shell structure of the first to the fourth row elements were studied by the electron location function （ELF）. The shell radii and population in individual shells were calculated and the relationship between the atom numbers and the atomic radii was discussed. The results could help to understand the atomic shell structure,