化学元素是具有相同核电荷数的同一类原子的总称。
Chemical element is the general term for the same type of atoms with the same mass number.
931年在哥伦比亚大学，哈罗德·尤里发现同位素，有两个核电荷数。
In 1931, at Columbia University, Harold Yuri discovered this isotope, which has two.
发现此关系式与主量子数和角量子数有关，而与核电荷数以及折合质量无关。
It is pointed out that the relation has something to do with the principal quantum number and the angular quantum number, but nothing to do with the nuclear electronic number and reduced mass.
发现此关系式与主量子数和角量子数有关，而与核电荷数以及折合质量无关。
It is pointed out that the relation has something to do with the principal quantum number and the angular quantum number, but nothing to do with the nuclear electronic number and reduced mass.
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