Francium is the densest of the Alkali Metals and also radioactive.
钫是碱金属密度最大的,具有放射性。
Francium is the densest of the Alkali Metals and also radioactive.
钫是碱金属密度最大的,具有放射性。
So little is known about it, because there is only about 1 ATOM OF FRANCIUM IN A CUBIC FOOT OF URANIUM ORE!
对它所知甚少,因为在1立方英尺的铀矿石,仅有1个钫原子!
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