Nickel powder

CAS number : 7440-02-0

Molecular weight :58.69

Molecular formula/chemical symbol :Ni

Description :

Nickel is a chemical element with the chemical symbol Ni and atomic number 28. It is a silvery-white lustrous metal with a slight golden tinge. Nickel belongs to the transition metals and is hard and ductile. Nickel is a silvery-white metal with a slight golden tinge that takes a high polish. It is one of only four elements that are magnetic at or near room temperature, the others being iron, cobalt and gadolinium. Its Curie temperature is 355 °C, meaning that bulk nickel is non-magnetic above this temperature. The unit cell of nickel is a face centered cube with the lattice parameter of 0.352nm giving an atomic radius of 0.124nm. Nickel belongs to the transition metals and is hard and ductile.

Formula	Atomic Number	Molecular Weight	Electronegativity (Pauling)	Density	Melting Point	Boiling Point	Vanderwaals radius	Ionic radius	Energyof first ionization
Ni	28	58.71 g.mol -1	1.8	8.9g.cm-3 at 20 °C	1453 °C	2913 °C	0.124 nm	0.069nm (+2) ; 0.06 nm (+3)	735kJ.mol-1

Isotopes	Atomic Mass	% Abundance on Earth
Ni-58	57.935	60.08
Ni-60	59.931	26.22
Ni-61	60.931	1.14
Ni-62	61.928	3.63
Ni-64	63.978	0.93

USES :

The fraction of global nickel production presently used for various applications is as follows: 46% for making nickel steels; 34% in nonferrous alloys and superalloys; 14% electroplating, and 6% into other uses. Nickel foam or nickel mesh is used in gas diffusion electrodes for alkaline fuel cells. Nickel and its alloys are frequently used as catalysts for hydrogenation reactions.