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As early as 1870, chemists thought that there should be an alkali metal beyond caesium, with an atomic number of 87 . It was then referred to by the provisional name eka-caesium. Research teams attempted to locate and isolate this missing element, and at least four false claims were made that the element had been found before an authentic discovery was made

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Francium is an alkali metal whose chemical properties mostly resemble those of caesium. A heavy element with a single valence electron, it has the highest equivalent weight of any element.

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Introducing the most radioactive naturally occurring element. Any questions you want answered? Leave them in the comments below. Enjoy! Cool Chemistry Merchandise Here: http://www.cafepress.com/TheChemistryQuestion

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https://iquimicas.com/francio-para-que-sirve/

https://en.wikipedia.org/wiki/Francium

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PERIODIC TABLE