阿斯塔汀

Astatine, with the atomic number 85, is a radioactive element and extremely rare.
砹是原子序数为85的一种放射性元素，极其稀有。
The half-life of astatine-210, an isotope of astatine, is approximately 8 hours.
砹-210，砹的一个同位素，其半衰期约为8小时。
Although astatine has no stable isotopes, it can be produced in minute quantities in a nuclear reactor.
尽管砹没有稳定的同位素，但它可以在核反应堆中以微小的数量被生成。
Due to its rarity and radioactivity, astatine has not found any practical applications yet.
由于砹的罕见性和放射性，目前尚未发现它的实际应用。
Astatine's chemical behavior is similar to that of iodine, which is why it belongs to the halogen family.
砹的化学性质与碘相似，因此它属于卤族元素。
In theory, astatine might have potential use in cancer treatment through targeted alpha-particle therapy.
理论上讲，砹可能通过靶向α粒子疗法在癌症治疗方面具有潜在的应用价值。
Radioactive decay of astatine releases high-energy particles, making it hazardous to handle without proper protection.
砹的放射性衰变会释放高能粒子，因此在没有适当防护的情况下处理它是危险的。
To date, only a few milligrams of astatine have ever been synthesized in laboratories worldwide.
到目前为止，全世界实验室合成的砹总共也只有几毫克。
Astatine is not found naturally on Earth due to its rapid radioactive decay into other elements.
由于砹迅速地放射性衰变成其他元素，在地球上并未发现天然存在的砹。
Researchers continue to study astatine's properties in hopes of discovering new applications for this unique element.
研究人员继续研究砹的性质，希望能为这一独特元素发掘出新的应用。