求翻译：尽管同族元素的电子层数从上到下逐渐增加，但价电子排布完全相同。例如，钠原子的价电子排布为3s1，钠元素属ⅠA；氯元素的价电子排布为3s23p5，氯元素属于ⅦA。因此，主族元素的族序数等于价电子总数，除氦元素外，稀有气体元素原子的最外层电子排布均为ns2np6，呈现稳定结构，称为零族元素，也称为ⅧA族是什么意思？

Although the the congeners electronic layers from top to bottom gradually increased, but the valence electrons arranged exactly the same. For example, the sodium atom valence electron arrangement as the 3s1 sodium is a Ⅰ, a; chlorine valence electron arrangement for the 3s23p5, chlorine is Ⅶ a. Ther

Even though the ethnic elements of the E-layer increases progressively from top to bottom, but price is exactly the same as electronic. For example, sodium atoms of the price for the e3s1A, and sodium chloride IA elements; the price for the e-3, s 5 23 P VIIA chlorine element belongs to. Therefore,

Although the consanguineous element electronic layer gradually increases from top to bottom, but the valence electron distribution is completely same.For example, the sodium atom valence electron distribution is 3s1, the sodium element isⅠA; The chlorine element valence electron distribution is 3s23

Congeners of the electronic layer gradually increases from top to bottom, but exactly the same Valence electron configuration. For example, the valence electron configuration of an atom of sodium 3s1, sodium is I a; Valence electron arrangement of chlorine elements as 3s23p5, chlorine elements belon

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