Beryllium
Elemental State Be
Electron Configuration 1s22s2
First Ionization Potential 9.323 eV
Electron Affinity  
Z* 1.912 (Clementi-Raimondi)
Pauling Electronegativity 1.57
Covalent Radius 0.90 Å
Metallic Radius 1.12 Å
Ionic Radius 0.30 Å Be2+ coordination number = 3

0.41 Å Be2+ coordination number = 4

0.59 Å Be2+ coordination number = 6

van der Waal's Radius  
Melting Point 1287 oC
Boiling Point 2471 oC
Density 1.848 g/cm3
Other Properties