1869年,俄国化学家门捷列夫按照元素周期律编制了史上第一张化学元素周期表。之后,新元素不断被科学家们发现或合成。自从1937年科学家们首次合成第43号元素锝(Tc)以后,每隔几年,就有几种新元素在实验室中“诞生”。人工合成新元素,必须让两个原子量较小的原子相互撞击,使它们的原子核融合,从而得到原子量较大的新原子。其过程如同让一颗行星撞击到另一颗行星 In 1869, the Russian chemist Mendeleev compiled the first chemical periodic table according to the periodic law of the elements. After that, new elements are constantly discovered or synthesized by scientists. Since the first synthesis of Tc by scientists in 1937, several new elements have been “born” in the laboratory every few years. Artificial synthesis of new elements, you must let two atomic atoms collide with each other, so that their nuclear fusion, resulting in a larger atomic weight of new atoms. The process is the same as hitting a planet to another planet