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打开元素周期表,我们会发现,锂元素位于第三位,在它之前是氢和氦。氢和氦是宇宙中含量最多的两种元素,而且天文学家根据大爆炸理论推算出的氢含量、氦含量的数值,与通过对宇宙观测得到的数值是一致的。然而锂元素在宇宙中的含量却让天文学家很意外。通过观察银河系的天体,他们发现锂元素的同位素之一锂﹣7(原子核中含有3个质子和4个中子)在各个星球上的丰度都差不多。这个现象表明,锂元素可能早在
Open the periodic table of the elements, we will find that the lithium element in the third place, before it is hydrogen and helium. Hydrogen and helium are the two most abundant elements in the universe, and the numerical values of hydrogen and helium calculated by astronomers based on the big-bang theory are consistent with those obtained from observing the universe. However, the amount of lithium in the universe makes astronomers surprised. By observing the galaxy’s celestial bodies, they found that lithium-7, one of the isotopes of lithium (nuclei contain 3 protons and 4 neutrons), has similar abundances on all planets. This phenomenon shows that lithium may be as early as possible