Chromium
Elemental State Cr
Electron Configuration 1s22s22p63s23p64s13d5
First Ionization Potential 6.767 eV
Electron Affinity 0.666 eV
Z* 5.133 (Clementi-Raimondi)
Pauling Electronegativity 1.66
Covalent Radius 1.27 Å
Metallic Radius 1.29 Å
Ionic Radius 0.87 Å Cr2+ coordination number = 6; low spin

0.94 Å Cr2+ coordination number = 6; high spin

0.755 Å Cr3+ coordination number = 6

0.55 Å Cr4+ coordination number = 4

0.69 Å Cr4+ coordination number = 6

0.40 Å Cr6+ coordination number = 4

0.58 Å Cr6+ coordination number = 6

van der Waal's Radius  
Melting Point 1907 oC
Boiling Point 2671 oC
Density 7.19 g/cm3
Other Properties