它是根据原子序数的增加来排列的，原子序数是一种元素单个原子的质子数。

It is arranged according to increasing atomic number, which is the number of protons in each atom of an element.

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它是根据原子序数的增加来排列的，原子序数是一种元素单个原子的质子数。

It is arranged according to increasing atomic number, which is the number of protons in each atom of an element.

youdao