累计查询 0.00 亿次

francium

/ˈfrænsiəm/ /ˈfrænsiəm/
  • n.
    元素钫

双语例句

  1. 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。
  2. 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。
  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。

网络短语

  • francium oxide
    氧化钫
  • francium isotope
    钫同位素
  • Fr Francium
  • eka francium
    类钫
  • francium compound
    钫化合物

英英释义

  • n.a radioactive element of the alkali-metal group discovered as a disintegration product of actinium

词源

  • francium
    来自法国上世纪核物理学家Marguerite Catherine Perey以其祖国命名的化学元素。