Ni
Nickel
Atomic number: 28Mass: 58.693 uCategory: Transition Metal
About Nickel
Nickel is a silvery-white lustrous metal with a slight golden tinge. It is corrosion-resistant, takes a high polish, and is used in many alloys. Nickel is an important component of stainless steel
Properties
Period
4
Group
10
Block
D
Category
Transition Metal
Electronegativity
1.91 (Pauling)
Ionization Energy
737.1 kJ/mol
Melting Point
1728 K (1455°C)
Boiling Point
3003 K (2730°C)
Density
8.908 g/cm³
Oxidation States
+2, +3
Electron Configuration
1s² 2s² 2p⁶ 3s² 3p⁶ 3d⁸ 4s²
[Ar] 3d⁸ 4s²
Shell 1:2e⁻
Shell 2:8e⁻
Shell 3:16e⁻
Shell 4:2e⁻
Real-World Uses
Stainless steel
Coins
Rechargeable batteries
Electroplating
Catalysts
Fun Fact
The US five-cent coin is called a 'nickel' but only contains 25% nickel — the rest is copper!