What is another word for francium?
Pronunciation: [fɹˈansi͡əm] (IPA) 
Francium is a chemical element that belongs to the group of alkali metals. It has the atomic number 87 and is highly radioactive. Some of the synonyms of francium include actinium K, eka-caesium, and celtium. It is the second rarest naturally occurring element and can be found in trace amounts in uranium and thorium ores. The element is highly reactive, and due to its radioactivity, it has limited applications. Its properties have not been extensively studied due to its rarity, but it is believed to have properties similar to other alkali metals. Francium's discovery and isolation remain critical moments in the history of chemistry.
