详细释义
Noun:
-
a radioactive element of the alkali-metal group discovered as a disintegration product of actinium
双语例句
- 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.
- 钫的最稳定的同位素, 钫 -223 也只有22分钟的半衰期.
来自互联网
相关词汇
- FR 故障率（=failure...
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