英语单词分类 轻松记单词

promethium

简写符号: Pm

promethium基本解释

n.[化]钷(稀土金属元素;符号 Pm;原子序61)

promethium同义词

promethium英英释义

Noun:
  • a soft silvery metallic element of the rare earth group having no stable isotope; was discovered in radioactive form as a fission product of uranium