Nickel was discovered in 1751 by the Swedish chemist Axel Fredrik Cronstedt in the mineral niccolite (NiAs).
Name: Nickel
Symbol: Ni
Atomic number: 28
Atomic weight: 58.693
State: solid
Group, period, block: 10, 4, d
Color: lustrous, metallic, and silver with a gold tinge
Classification: transition metal
Electron configuration: 4s2 3d8
2,8,16,2
Physical properties
Density: 8.908 g/cm-3
Melting point: 1728 K, 1455 °C, 2651 °F
Boiling point: 3186 K, 2913 °C, 5275 °F
Atomic properties
Oxidation states: 4[1], 3, 2, 1[2], -1
Electronegativity: 1.91 (Pauling scale)
Ionization energies: 1st: 737.1 kJ·mol-1
Covalent radius: 124±4 pm
Van der Waals radius: 163 pm
- Ni
Electron Configuration
Isotopes
There are five naturally occurring isotopes of nickel exist, 58Ni, 60Ni, 61Ni, 62Ni, and 64Ni.