PERIODIC ELEMENT
Ni (Nickel)




Atomic number : 28
Atomic mass : 58.71 g.mol-1
Electronegativity according to Pauling : 1.8
Density : 8.9 g.cm-3 at 20 °C
Melting point : 1453 °C
Boiling point : 2913 °C
Vanderwaals radius : 0.124 nm
Ionic radius : 0.069 (+2) nm ; 0.06 (+3) nm
Isotopes : 10
Electronic shell : [Ar] 3d8 4s2
Energy of first ionisation : 735 kJ.mol-1
Energy of second ionisation : 1753 kJ.mol-1
Energy of third ionisation : 3387 kJ.mol-1
Standard Potential : - 0.25 V
Discovered by : Alex Constedt 1751
 
Atomic Structure Uses (electroplating metal alloys, nickel-cadmium batteries)