元素周期表缺少第43号元素——缺锝(德)
Technetium (锝),第一个人造元素,所以按希腊文Technetos(人造)命名为Technetium。It is the lightest element whose isotopes are all radioactive, none of which is stable other than the fully ionized state of ⁹⁷Tc. Nearly all available technetium is produced as a synthetic element.
#歇后语
#文明骂街
这是今天和德云社张霄白学的,没点化学知识骂人也听不懂~