Nickel (Ni) » Innovachem

Isotope	Z(p)	N(n)	Atomic Mass	Natural Abundance	Enrichment Level	Chemical Form
Ni-58	28	30	57.935348	68.08%	≥99.48%	Metal
Ni-58	28	30	57.935348	68.08%	≥98.81%	Oxide
Ni-60	28	32	59.930790	26.22%	89.00-99.60%	Metal
Ni-60	28	32	59.930790	26.22%	89.00-99.60%	Oxide
Ni-61	28	33	60.931060	1.14%	91.00->99.00%	Metal
Ni-61	28	33	60.931060	1.14%	91.00->99.00%	Oxide
Ni-62	28	34	61.928348	3.63%	98.00-99.28%	Metal
Ni-62	28	34	61.928348	3.63%	98.00-99.28%	Oxide
Ni-64	28	36	63.927969	0.93%	95.00-99.32%	Metal
Ni-64	28	36	63.927969	0.93%	91.00-99.32%	Oxide

Name	Nickel
Symbol	Ni
Atomic number	28
Atomic weight	58.693
Standard state	Solid at 298 °K
CAS Registry ID	7440-02-0
Group in periodic table	10
Group name	None
Period in periodic table	4
Block in periodic table	d-block
Color	Lustrous metallic silvery tinge
Classification	Metallic
Melting point	1445 °C
Boiling point	2730 °C
Thermal conductivity	90.9 W/(m·K) at 298.2 °K
Electrical resistivity	6.97 µΩ·cm at 20 °C
Electronegativity	1.8
Specific heat	0.44 kJ/kg K
Heat of vaporization	378 kJ·mol^-1at 2732 °C
Heat of fusion	17.2 kJ·mol^-1
Density of solid	8.91 g/cm³ at 20 ºC
Electron configuration	[Ar]3d⁸4s²
Oxidation states	0, +1, +2, +3
Most common oxidation state	+2
Atomic radius	1.24 Å
Ionic radius	Ni²⁺: 0.70 Å