PERIODIC ELEMENT
Sc (Scandium)

 



Atomic number : 21
Atomic mass : 44.9559 g.mol-1
Electronegativity according to Pauling : unknown
Density : 3.0g.cm-3 at 20 °C
Melting point : 1541 °C
Boiling point : 2836 °C
Vanderwaals radius : 0.161 nm
Ionic radius : 0.083 (+3) nm
Isotopes : 7
Electronic shell : [Ar] 3d1 4s2
Energy of first ionisation : 640.5 kJ.mol-1
Energy of second ionisation : 1233 kJ.mol-1
Energy of third ionisation : 2389 kJ.mol-1
Energy of fourth ionisation : 7089 kJ.mol-1
Discovered by : Lars Nilson in 1879
 
Atomic Structure Uses (Some Parts of the MiG-29)