'promethium'是英语单词,中文翻译为“钷”。
钷是一种人工合成的放射性元素,化学符号为Pm,原子序数为61,属于镧系元素。钷的化学性质类似于镧和钕,主要在核反应堆中产生。它的放射性强,是一种有害的放射性元素。
以下是9个包含“promethium”的例句,以英语和中文翻译为例:
1. Promethium is a rare earth element that has a half-life of only a few years. (钷是一种稀土元素,其半衰期只有几年。)
2. Scientists use promethium-147 to measure the thickness of materials in industry. (科学家使用钷-147来测量工业材料的厚度。)
3. Promethium has a bright, green glow when exposed to certain conditions, making it useful for lighting. (钷在某些条件下有明亮的绿色发光,因此在照明方面很有用。)
4. Promethium is not found in nature and must be synthesized in a laboratory. (钷在自然界中不存在,必须在实验室中合成。)
5. Promethium has several isotopes, some of which have medical applications. (钷有几种同位素,其中一些具有医学应用。)
6. Promethium is a highly radioactive element, and exposure to it can be dangerous. (钷是一种高度放射性元素,接触钷可能会有危险。)
7. Promethium is used in research reactors to produce neutrons for scientific experiments. (钷在研究反应堆中用来产生中子,用于科学实验。)
8. Promethium has been suggested as a possible fuel for future space missions due to its high energy density. (由于钷的高能量密度,已经有人提议将其作为未来太空任务的燃料。)
9. The discovery of promethium was a significant milestone in the study of nuclear chemistry. (钷的发现是核化学研究的一项重要里程碑。)
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