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词汇 polonium
释义

Definition of polonium in English:

polonium

noun pəˈləʊnɪəmpəˈloʊniəm
mass noun
  • The chemical element of atomic number 84, a radioactive metal occurring in nature only as a product of radioactive decay of uranium.

    (化学元素)钋(符号: Po

    Example sentencesExamples
    • Gentry had discovered that granites contain microscopic coloration halos produced by the radioactive decay of primordial polonium.
    • This generator is a small pellet of polonium and beryllium, separated by foil within the fissionable fuel core.
    • Radon can enter the body through the lungs, where it undergoes alpha decay to form polonium, a radioactive solid that remains in the lungs and continues to emit cancer-causing radiation.
    • In the process, she discovered two new elements that are millions and billions of times more radioactive than uranium: radium and polonium.
    • The uranium eventually decays to radium and, eventually to polonium-210, a substance that, when inhaled, can endanger tissue health and damage the immune system.

Origin

Late 19th century: modern Latin, from medieval Latin Polonia 'Poland' (the native country of Marie Curie, the element's co-discoverer).

Rhymes

ammonium, euphonium, harmonium, pandemonium, pelargonium, plutonium, zirconium

Definition of polonium in US English:

polonium

nounpəˈlōnēəmpəˈloʊniəm
  • The chemical element of atomic number 84, a radioactive metal occurring in nature only as a product of radioactive decay of uranium.

    (化学元素)钋(符号: Po

    Example sentencesExamples
    • This generator is a small pellet of polonium and beryllium, separated by foil within the fissionable fuel core.
    • In the process, she discovered two new elements that are millions and billions of times more radioactive than uranium: radium and polonium.
    • The uranium eventually decays to radium and, eventually to polonium-210, a substance that, when inhaled, can endanger tissue health and damage the immune system.
    • Radon can enter the body through the lungs, where it undergoes alpha decay to form polonium, a radioactive solid that remains in the lungs and continues to emit cancer-causing radiation.
    • Gentry had discovered that granites contain microscopic coloration halos produced by the radioactive decay of primordial polonium.

Origin

Late 19th century: modern Latin, from medieval Latin Polonia ‘Poland’ (the native country of Marie Curie, the element's co-discoverer).

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