Copper
Elemental State Cu
Electron Configuration 1s22s22p63s23p64s13d10
First Ionization Potential 7.726 eV
Electron Affinity 1.235 eV
Z* 5.858 (Clementi-Raimondi)
Pauling Electronegativity 1.90
Covalent Radius 1.38 Å
Metallic Radius 1.28 Å
Ionic Radius 0.60 Å Cu+ coordination number = 2

0.74 Å Cu+ coordination number = 4

0.91 Å Cu+ coordination number = 6

0.71 Å Cu2+ coordination number = 4

0.71 Å Cu2+ coordination number = 4, square planar

0.79 Å Cu2+ coordination number = 5

0.87 Å Cu2+ coordination number = 6

0.68 Å Cu3+ coordination number = 6; low spin

van der Waal's Radius 1.43 Å
Melting Point 1085 oC
Boiling Point 2562 oC
Density 8.96 g/cm3
Other Properties