https://padlet.com/ainhoaurbano12/n50ezxxol9js Hecho por Ainhoa,Nuria,Cintia y Nuria en-us 2017-05-29 08:04:19 UTC 2017-06-06 10:51:05 UTC hello@padlet.com https://padlet-assets.s3.amazonaws.com/icons/Cake.png ainhoaurbano12 https://padlet.com/ainhoaurbano12/n50ezxxol9js/wish/174213757 2017-05-29 08:18:54 UTC https://padlet.com/ainhoaurbano12/n50ezxxol9js/wish/174213757 ainhoaurbano12 https://padlet.com/ainhoaurbano12/n50ezxxol9js/wish/174214812 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]]> 2017-05-29 08:26:32 UTC https://padlet.com/ainhoaurbano12/n50ezxxol9js/wish/174214812 ainhoaurbano12 https://padlet.com/ainhoaurbano12/n50ezxxol9js/wish/174214944 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.]]> 2017-05-29 08:27:25 UTC https://padlet.com/ainhoaurbano12/n50ezxxol9js/wish/174214944 ainhoaurbano12 https://padlet.com/ainhoaurbano12/n50ezxxol9js/wish/174379196 https://iquimicas.com/francio-para-que-sirve/

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

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