Fr
87alkali metalGenerated with AI1 min read
Francium
SymbolFr
Atomic Mass223
Francium is a chemical element with symbol Fr and atomic number 87. It used to be known as eka-caesium and actinium K. It is the second-least electronegative element, behind only caesium. Francium is a highly radioactive metal that decays into astatine, radium, and radon.
Properties
- Phase: Solid
- Density: 1.87 g/cm³
- Melting Point: 300 K
- Boiling Point: 950 K