francium
「francium」的意思
n. 元素钫
n.[化]钫
「francium」的用法
francium氟化物 - 化学元素
「francium」的例句
Francium is a chemical element with the symbol Fr and atomic number 87.
氟化物是一种化学元素，符号为Fr，原子序数为87。
The francium atom has seven valence electrons.
氟化物原子有七个价电子。
Francium is a rare element found in trace amounts in the Earth's crust.
氟化物是一种稀有元素，在地球的 crust 中以微量存在。
Francium is highly reactive and decays rapidly.
氟化物非常活跃，迅速衰变。
The francium ion has a +1 charge.
氟化物离子带有一个正一电荷。
Francium was first synthesized in 1939 by Edwin McMillan and Philip H. Abelson.
氟化物于1939年由Edwin McMillan和Philip H. Abelson首次合成。
Francium has no stable isotopes and all known isotopes are radioactive.
氟化物没有稳定的同位素，已知的所有同位素都是放射性的。
The francium atom has a large atomic radius due to its high electron configuration.
氟化物原子由于其高的电子配置而具有较大的原子半径。
Francium is highly reactive with water, producing hydrogen gas and hydrofluoric acid.
氟化物与水反应剧烈，产生氢气和氢氟酸。
Francium is used in various scientific applications, including nuclear research.
氟化物在各种科学应用中使用，包括核研究。