n.[化]钷（稀土金属元素；符号 Pm；原子序61）
My father found that promethium orb 20 years ago... |我父亲在20年前找到的这颗珠子...
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. 本文详细及正确地介绍了放射性元素钷的发现史,特别强调了离子交换技术在钷的分离及鉴定中的重要作用。
Keywords promethium;aquatic ecosystem;dynamics.; 钷;水域生态系;动力学;
radioactive isotope of promethium 147钷, 149钷, 151钷
promethium addition 钷添加合金
