radioactinium是什么意思_radioactinium怎么读_radioactinium的音标

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radioactinium
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单词大全
更新时间
2026-11-06 13:25:57
「radioactinium」是一个常用成语，以下为其拼音、释义、出处、用法、典故及例句等详细内容，供学习与查阅参考。

“radioactinium”的音标：英式 /ˌreɪdɪəʊækˈtɪniəm/，美式 /ˌreɪdioʊækˈtɪniəm/

“radioactinium”的用法和例句8句：

  • Radioactinium is a radioactive isotope of actinium, specifically actinium-227, which plays a key role in the thorium-232 decay series.
  • In early 20th-century nuclear research, radioactinium was studied to elucidate the sequence of radioactive decays in the actinium series.
  • The half-life of radioactinium (Ac-227) is approximately 21.8 years, making it a relatively stable intermediate in the thorium decay chain.
  • Radioactinium decays primarily by beta emission, forming francium-223, which further decays into astatine-219.
  • Due to its radioactivity, samples of radioactinium must be stored in lead-shielded containers to prevent radiation exposure.
  • The term "radioactinium" was historically used before actinium-227 was formally classified as part of the actinide elements.
  • Geologists analyze trace amounts of radioactinium in uranium-thorium ores to determine the geological age of mineral formations.
  • The discovery of radioactinium contributed significantly to the understanding of radioactive equilibrium in natural decay series.
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来源：词义通　|　更新时间：2026-11-06 13:25:57　|　如有错漏欢迎反馈纠错

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