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单词 ionium
释义

Definition of ionium in English:

ionium

noun ʌɪˈəʊnɪəm
Chemistry

  • A radioactive isotope of thorium with mass number 230, produced by the alpha decay of uranium-234 and decaying in turn to radium-226 with a half-life of 75,000 years. Symbols Io, 230Th.

Origin

Early 20th century. From ion + -ium. With the semantic motivation, compare quot. 1907.

Definition of ionium in US English:

ionium

nounʌɪˈəʊnɪəm
Chemistry

  • A radioactive isotope of thorium with mass number 230, produced by the alpha decay of uranium-234 and decaying in turn to radium-226 with a half-life of 75,000 years. Symbols Io, 230Th.

Origin

Early 20th century. From ion + -ium. With the semantic motivation, compare quot. 1907.
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更新时间：2025/1/14 12:23:44