1.【化】钷
1.a radioactive metallic element.
1.Study of Preparation Process for Crystalline Promethium- neodymium Carbonate
晶型碳酸镨钕沉淀制备工艺的研究
2.Technetium (atomic 43), promethium (atomic 61), Polonium (atomic 84)and all elements with an atomic number greater than 84;
锝(原子序数43)、钷(原子序数61)、钋(原子序数84)及原子序数大于84的所有化学元素;