化学元素的起源与元素周期率化学元素的起源在分析一些恒星辐射的光谱时，科学家们发现恒星上氢元素的丰度（即相对质量百分数）非常之大，约占７０％，氦次之，约占２５％，而且各个天体上氢、氦两元素的丰度几乎相同。而其他重元素的丰度则很少，且不同的天体，各种重元... The Origin of Chemical Elements and the Periodic Rates of Elements The Origin of Chemical Elements In analyzing the spectra of some stellar radiation, scientists have found that the abundance (ie, relative mass percentage) of hydrogen on stellar stars is very high, accounting for about 70%, followed by helium, Accounting for about 25%, and the abundance of hydrogen and helium on each celestial body is almost the same. While the abundance of other heavy elements is very small, and different celestial bodies, various heavy elements ...