francium

简明释义

英[ˈfrænsiəm]美[ˈfrænsiəm]

n. 元素钫

英英释义

单词用法

同义词

反义词

例句

1.Gallium is solid at room temperature but will melt if held in your hand, caesium (Cs), and francium (Fr) ?the second rarest naturally occurring element, can also be liquid at or near room temperature.

金属镓在室温里是固体状态但是把它放在你的手上它就会融化，金属铯，元素钫这些比较稀有的元素在室温或者接近室温的情况下是液体状态的。

2.Gallium is solid at room temperature but will melt if held in your hand, caesium (Cs), and francium (Fr) ?the second rarest naturally occurring element, can also be liquid at or near room temperature.

金属镓在室温里是固体状态但是把它放在你的手上它就会融化，金属铯，元素钫这些比较稀有的元素在室温或者接近室温的情况下是液体状态的。

3.Because Francium is mainly only found synthetically in laboratory research, it has no known use outside of the laboratory.

由于钫主要仅在实验室研究中产生，它在实验室外没有已知的用途。

4.Even Francium's most stable isotope, Francium-223 only has a half-life of 22 minutes.

钫的最稳定的同位素，钫- 223也只有22分钟的半衰期。

5.Francium is the densest of the Alkali Metals and also radioactive.

钫是碱金属中密度最大的，具有放射性。

6.The atomic number of francium is 87, making it one of the heaviest alkali metals.

法郎素的原子序数是87，使其成为最重的碱金属之一。

7.Due to its rarity, francium is not commonly encountered in laboratories.

由于其稀有性，法郎素在实验室中并不常见。

8.The element francium is highly radioactive and has a very short half-life.

元素法郎素是高度放射性的，且半衰期非常短。

9.Because of its extreme radioactivity, handling francium requires special precautions.

由于其极端的放射性，处理法郎素需要特别的防护措施。

10.Researchers are fascinated by the properties of francium despite its instability.

尽管法郎素不稳定，研究人员仍对其特性感到着迷。

作文

Francium is one of the most intriguing elements in the periodic table, represented by the symbol Fr. It was discovered in 1939 by the French physicist Marguerite Perey at the Curie Institute in Paris. As an alkali metal, francium is located in group 1 and is known for being highly radioactive and unstable. In fact, it is the least stable of the first 101 elements on the periodic table, with its most stable isotope, francium-223, having a half-life of only 22 minutes. This rapid decay makes francium extremely rare in nature, as it is estimated that there are only about 30 grams of it naturally occurring on Earth at any given time.The rarity of francium is a significant aspect of its identity. It is produced from the decay of actinium-227 and can be synthesized in minute quantities in particle accelerators. Due to its short half-life, francium does not have many practical applications, but it serves as an important subject of study for scientists interested in nuclear physics and radioactivity. The element's extreme radioactivity poses challenges in research, as handling even small amounts requires specialized equipment and safety protocols.One interesting property of francium is its predicted behavior based on its position in the periodic table. Like other alkali metals, francium is expected to be highly reactive, especially with water. When it reacts with water, it is theorized to produce hydrogen gas and francium hydroxide, similar to the reactions of other alkali metals, albeit with much greater vigor due to its high reactivity. However, due to its scarcity and radioactivity, such experiments are rarely conducted.The study of francium has implications beyond just chemistry; it also plays a role in understanding the fundamental properties of matter and the forces that govern atomic interactions. Researchers continue to explore the characteristics of francium and its isotopes, contributing to our knowledge of atomic structure and stability. Additionally, investigations into its properties may yield insights into the behavior of other heavy elements, enhancing our understanding of the periodic table as a whole.In conclusion, francium is a fascinating element that captures the curiosity of scientists and students alike. Its rarity, radioactivity, and predicted chemical behavior make it a unique subject of study. While it may not have widespread practical applications, the research surrounding francium contributes to the broader field of chemistry and helps us appreciate the complexities of the elements that make up our universe. Understanding elements like francium not only enriches our scientific knowledge but also inspires future generations of scientists to delve deeper into the mysteries of the natural world.

法郎是周期表中最引人入胜的元素之一，符号为Fr。它于1939年由法国物理学家玛格丽特·佩雷在巴黎的居里研究所发现。作为一种碱金属，法郎位于第1族，以高度放射性和不稳定性而闻名。事实上，它是前101种元素中稳定性最差的元素，其最稳定的同位素法郎-223的半衰期仅为22分钟。这种快速衰变使得法郎在自然界中极其稀有，估计在地球上任何时候都只有约30克的天然存在。法郎的稀有性是其身份的重要方面。它是由铀-227衰变产生的，并且可以在粒子加速器中以微量合成。由于其短暂的半衰期，法郎没有很多实际应用，但它是科学家研究核物理和放射性的一个重要课题。该元素的极端放射性在研究中带来了挑战，因为处理即使是少量也需要专门的设备和安全协议。法郎的一个有趣性质是根据其在周期表中的位置预测的行为。像其他碱金属一样，法郎预计具有很高的反应性，尤其是与水的反应。当它与水反应时，预计会产生氢气和法郎氢氧化物，类似于其他碱金属的反应，但由于其高反应性，反应的剧烈程度将大大增强。然而，由于其稀缺性和放射性，此类实验很少进行。对法郎的研究不仅仅局限于化学；它还在理解物质的基本性质和支配原子相互作用的力量方面发挥了作用。研究人员继续探索法郎及其同位素的特性，丰富我们对原子结构和稳定性的知识。此外，对其性质的研究可能会为我们提供对其他重元素行为的见解，从而增强我们对整个周期表的理解。总之，法郎是一个迷人的元素，吸引着科学家和学生的好奇心。它的稀有性、放射性和预测的化学行为使其成为一个独特的研究对象。虽然它可能没有广泛的实际应用，但围绕法郎的研究为化学的更广泛领域做出了贡献，并帮助我们欣赏构成宇宙的元素的复杂性。理解像法郎这样的元素不仅丰富了我们的科学知识，还激励未来一代科学家深入探索自然世界的奥秘。