鈁
From Wikipedia, the free encyclopedia
鈁(粵拼:Fong1,Francium),又叫鍅(粵拼:Faat3),係一種放射性嘅鹼金屬元素,符號係Fr,原子序數87,相對原子質量222.0397,1939年喺巴黎發現,並且用「法國」嚟起名。
鈁係鹼金屬,由於佢有放射性,而且化學反應極之活躍,因此到而家都整唔到純鈁。
鈁可以喺鈾礦同埋釷礦道發現,亦可以透過以質子轟擊釷而得到。
鈁有41種同位素,其中以鈁-223嘅半衰期最長,大概22分鐘。
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