Francium is a chemical element with symbol Fr and atomic number 87. It used to be known as ... Atomic properties. Oxidation states, +1 (a strongly basic oxide) .Francium's melting point was calculated to be around 27 °C (80 °F, 300 K) read more
Francium is a chemical element with symbol Fr and atomic number 87. It used to be known as eka-caesium and actinium K.[a] It is the second-least electronegative element, behind only caesium, and is the second rarest naturally occurring element (after astatine). read more