Francium
Atomic number
87
Atomic weight
223
Discovery (year)
1939
Atomic radius (A)
2.6
Melting point (
o
C)
Boiling point (
o
C)
Density (g/cm
3
)
Specific heat (cal/g
o
C)
Ionization potential (eV)
Electron Affinity (eV)
