出典:Wiktionary
transuranium element (複数形 transuranium elements)
出典:Wikipedia
出典:『Wikipedia』 (2011/06/25 05:30 UTC 版)
In chemistry, transuranium elements (also known as transuranic elements) are the chemical elements with atomic numbers greater than 92 (the atomic number of uranium). None of these elements are stable and they all decay radioactively into other elements.