速英语 / 查找：“francium” [共找到3条结果]

  • francium例句

    The half - life of francium is 22 minutes.钫的半衰期是22分钟.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.Even Francium's most stable isotope, Francium - 223 only has a half - life of ...

  • francium的音标

    francium的音标：francium的英式发音音标为：['frænsiəm]francium的美式发音音标为：['frænsiəm]...

  • francium是什么意思？

    n.（放射性元素）钫（符Fr）...