时间:2022-06-03 20:04:48
n.
【化学】[钫]。
a radioactive element of the alkali-metal group discovered as a disintegration product of actinium
同义词:Fr, atomic number 87,
Francium is a chemical element with symbol?Fr and atomic number?87. It was formerly known as eka-caesium and actinium K.
The half-life of francium is 22 minutes .
钫的半衰期是22分钟。
Eating the francium of us the meal place the one that turn on at foreigner , the things inside chinese goods , it is but the one time expensive than that of china
我们的吃钣饭的地方都是外国人开的,里面的东西都是中国货,但比中国贵一倍。