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promethium

/prəˈmiː.θi.əm/

翻译: 一种银白色软金属元素,属于稀土元素,没有稳定同位素,最初以放射性形式在铀裂变产物中发现。

1 个条目

noun

/prəˈmiː.θi.əm/C2formalscientific
  • zh一种银白色软金属元素,属于稀土元素,没有稳定同位素,最初以放射性形式在铀裂变产物中发现。

A soft, silvery metallic element belonging to the rare earth group, which has no stable isotopes and was first discovered in a radioactive form as a fission product of uranium.

不可数

  1. Chemical elementC2formalscientific

    A soft, silvery, radioactive metallic element of the lanthanide series, with no stable isotopes, first discovered as a fission product of uranium.

    zh化学元素

    • Promethium is used in some specialized atomic batteries.
    • The element promethium was first isolated in 1945.
    • Due to its radioactivity, promethium must be handled with care.
词形
  • promethiums plural form
  • promethiums' possessive plural form
  • promethium's possessive singular form