BARIUM

Physical Properties

Atomic Number: 88
Mass Number: 137.327
Electron Configuration: 1s²2s²2p⁶3s²3p⁶4s²3d¹⁰4p⁶5s²4d¹⁰5p⁶6s²
Crystal Structure: Body-Centered Cubic
Density: 3.5 g/cm³
Melting Point: 725^oC
First Ionization Energy: 503 kJ/mol
Second Ionization Energy: 965 kJ/mol
Atomic Radius: 217 pm
Ionic Radius: 134 pm