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最后一个偶然发现的元素1869年是化学史上不平常的一年。就在这一年,天才的俄罗斯化学家门捷列夫(1834—1907)发现了化学上最重要的定律之一——元素周期律。这是“追捕”化学元素征途上的一盏指路明灯。1870年门捷列夫写道:“根据周期关系的指示……不仅可以指出还缺些什么元素,而且还可以有把握地确定这些尚未发现的元素的特性……”。他深信,他的第一张元素周期表中所留下的许多空位上,必有新元素补充进去;当时这些位置所以空着,并不是因为它们在自然界中不存在,而只是因为尚未被发现罢了。不仅
The last accidentally discovered element of 1869 was an unusual year in chemical history. In this year, the talented Russian chemist Mendeleev (1834-1907) discovered one of the most important chemical laws: the elemental periodic law. This is a guiding light on the hunt for chemical elements. In 1870, Mendeleev wrote: “According to the instructions of the cycle ... ... not only can we point out what elements are missing, but we can also confidently determine the characteristics of these undiscovered elements ...”. He is convinced that new elements must be added to many of the vacancies left in his first periodic table; these positions were left empty because they did not exist in nature, but only because they have not been discovered yet. Nothing more. not only