Jisho

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Noun
1. francium (Fr)
Wikipedia definition
2. FranciumFrancium is a chemical element with symbol Fr and atomic number 87. It was formerly known as eka-caesium and actinium K. It is one of the two least electronegative elements, the other being caesium. Francium is a highly radioactive metal that decays into astatine, radium, and radon. As an alkali metal, it has one valence electron. Bulk francium has never been viewed.
Read “Francium” on English Wikipedia
Read “フランシウム” on Japanese Wikipedia
Read “Francium” on DBpedia

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