neptunium / nɛpˈtu ni əm, -ˈtyu- /

📖毕业后词汇镎海王星镎类镎的作用

neptunium 的定义

n. 名词 noun

Chemistry, Physics.

  1. a transuranic element produced in nuclear reactors by the neutron bombardment of U-238: decays rapidly to plutonium and then to U-235. Symbol: Np; atomic number: 93.