
n.[化]钷(稀土金屬元素;符號 Pm;原子序61)
My father found that promethium orb 20 years ago... |我父親在20年前找到的這顆珠子...
The discovery of prometheum is presented in detail and emphasis is put on the important role of the ion exchange method in separating and identifying promethium. 本文詳細(xì)及正確地介紹了放射性元素钷的發(fā)現(xiàn)史,特別強(qiáng)調(diào)了離子交換技術(shù)在钷的分離及鑒定中的重要作用。
Keywords promethium;aquatic ecosystem;dynamics.; 钷;水域生態(tài)系;動力學(xué);
radioactive isotope of promethium 147钷, 149钷, 151钷
promethium addition 钷添加合金