radioactive element, 1946, named by French physicist Marguerite Catherine Perey (1909-1975) who first identified it at the Curie Institute in Paris, from Latinized form of France + element ending -ium.
实用例句
1. The half - life of francium is 22 minutes.
钫的半衰期是22分钟.来自辞典例句
2. 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.来自互联网
3. Even Francium's most stable isotope, Francium - 223 only has a half - life of 22 minutes.
