Francium is a chemical element that has the symbol Fr and atomic number 87. Soviet chemist D.K. Dobroserdov was the first scientist to claim to have found eka-caesium. Pereys francium analysis. Synthesising francium processing in nuclear reaction.
Аннотация к работе
Francium is a highly radioactive metal that decays into astatine, radium, and radon. As an alkali metal, it has one valence electron. Francium was discovered by Marguerite Perey in France (from which the element takes its name) in 1939.