Calcium
Elemental State Ca
Electron Configuration 1s22s22p63s23p64s2
First Ionization Potential 6.113 eV
Electron Affinity 0.0246 eV
Z* 4.398 (Clementi-Raimondi)
Pauling Electronegativity 1.00
Covalent Radius 1.74 Å
Metallic Radius 1.97 Å
Ionic Radius 1.14 Å Ca2+ coordination number = 6

1.26 Å Ca2+ coordination number = 8

van der Waal's Radius  
Melting Point 842 oC
Boiling Point 1484 oC
Density 1.55 g/cm3
Other Properties