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neptunium

/nɛpˈtjuː.ni.əm/

翻译: 一种放射性超铀金属元素,在铀矿石中以痕量存在,并作为生产钚的副产品生成。

1 个条目

noun

/nɛpˈtjuː.ni.əm/C2formalscientific
  • zh一种放射性超铀金属元素,在铀矿石中以痕量存在,并作为生产钚的副产品生成。

A radioactive transuranic metallic element that occurs in trace amounts in uranium ores and is produced as a by-product during the manufacture of plutonium.

不可数

  1. Chemical elementC2formalscientific

    A radioactive, silvery metallic transuranic element of the actinide series, with atomic number 93. It is found in trace amounts in uranium ores and is a by-product of plutonium production.

    zh化学元素

    • Neptunium was first synthesized in 1940 by bombarding uranium with neutrons.
    • Trace amounts of neptunium can be found naturally in uranium deposits.
    • The isotope neptunium-237 has a half-life of over two million years.
词形
  • neptuniums plural form
  • neptuniums' possessive plural form
  • neptunium's possessive singular form