PERIODIC ELEMENT
Cr (Chromium)

 



Atomic number : 24
Atomic mass : 51.996 g.mol-1
Electronegativity according to Pauling : 1.6
Density : 7.19g.cm-3 at 20 °C
Melting point : 1907 °C
Boiling point : 2672 °C
Vanderwaals radius : 0.127 nm
Ionic radius : 0.061 (+3) nm ; 0.044 (+6) nm
Isotopes : 6
Electronic shell : [Ar] 3d5 4s1
Energy of first ionisation : 651.0 kJ.mol-1
Energy of second ionisation : 1590.1 kJ.mol-1
Energy of third ionisation : 2987 kJ.mol-1
Standard Potential : -0.71 V (Cr3+ / Cr)
Discovered by : Vaughlin in 1797
 
Atomic Structure Uses (Stainless steel)