berkelium
noun [ U ] uk/bɜːˈkiː.li.əm/ us/ˈbɜ˞ː.kli.əm/
(symbol Bk)（放射性元素）锫
a chemical element that is a soft, silver-white metal, and is radioactive
Berkelium is a very expensive and rare element. 锫是一种非常昂贵的稀有元素。
- More examples
- He realized that berkelium could be extracted at the same time.
- The element was manufactured in a particle accelerator by smashing together isotopes of calcium and a radioactive element called berkelium.