Barium
Atomic number
56
Atomic weight
137.327
Discovery (year)
1808
Atomic radius (A)
2.18
Melting point (
o
C)
725
Boiling point (
o
C)
1639
Density (g/cm
3
)
3.5
Specific heat (cal/g
o
C)
0.068
Ionization potential (eV)
5.212
Electron Affinity (eV)
0
