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词汇 dubnium
释义

Definition of dubnium in English:

dubnium

noun ˈdʌbnɪəmˈdəbnēəm
mass noun
  • The chemical element of atomic number 105, a very unstable element made by high-energy atomic collisions.

    (化学元素)𨧀(符号: Db )。参见HAHNIUM,JOLIOTIUM

    See also hahnium, joliotium
    Example sentencesExamples
    • Following up on berkelium, dubnium and californium, researchers at the University of Berkely in California, stumbled upon am element with atomic number 117 about a year ago.
    • Similar controversies attended the much more recent synthesis and naming of the heaviest element of the group, dubnium.
    • Nine isotopes of Dubnium are now recognized.
    • For instance, after five alpha particles have been emitted we are left with element 105, which is called dubnium.

Origin

1990s: modern Latin, from Dubna in Russia, site of the Joint Nuclear Institute.

Definition of dubnium in US English:

dubnium

nounˈdəbnēəm
  • The chemical element of atomic number 105, a very unstable element made by high-energy atomic collisions.

    (化学元素)𨧀(符号: Db )。参见HAHNIUM,JOLIOTIUM

    See also hahnium, joliotium
    Example sentencesExamples
    • Following up on berkelium, dubnium and californium, researchers at the University of Berkely in California, stumbled upon am element with atomic number 117 about a year ago.
    • Similar controversies attended the much more recent synthesis and naming of the heaviest element of the group, dubnium.
    • For instance, after five alpha particles have been emitted we are left with element 105, which is called dubnium.
    • Nine isotopes of Dubnium are now recognized.

Origin

1990s: modern Latin, from Dubna in Russia, site of the Joint Nuclear Institute.

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