nickel
Sign in to saveNickel is a chemical element; it has symbol Ni and atomic number 28. It is a silvery-white lustrous metal with a slight golden tinge. Nickel is a hard and ductile transition metal. Pure nickel is chemically reactive, but large pieces are slow to react with air under standard conditions because a passivation layer of nickel oxide that prevents further corrosion forms on the surface. Even so, pure native nickel is found in Earth's crust only in tiny amounts, usually in ultramafic rocks, and in the interiors of larger nickel–iron meteorites that were not exposed to oxygen when outside Earth's atm
AI overview
Nickel is a silvery-white metal that is hard, ductile, and resistant to corrosion due to a protective oxide layer that forms on its surface. It matters because it is rarely found in pure form on Earth and has useful properties that make it valuable for industrial and manufacturing applications.
AI-generated from the Wikipedia summary — may contain errors.
Article
27 sectionsContents
- Properties
- Atomic and physical properties
- Electron configuration dispute
- Isotopes
- Occurrence
- Compounds
- Nickel(0)
- Nickel(I)
- Nickel(II)
- Nickel(III) and (IV)
- Hexavalent nickel
- History
- Coinage
- Canada
- Switzerland
- United Kingdom
- United States
- Current use
- World production
- Production
- Mond process
- Market value
- Applications
- Biological role
- Toxicity
- References
- External links
Nickel is a chemical element; it has symbol Ni and atomic number 28. It is a silvery-white lustrous metal with a slight golden tinge. Nickel is a hard and ductile transition metal. Pure nickel is chemically reactive, but large pieces are slow to react with air under standard conditions because a passivation layer of nickel oxide that prevents further corrosion forms on the surface. Even so, pure native nickel is found in Earth's crust only in tiny amounts, usually in ultramafic rocks, and in the interiors of larger nickel–iron meteorites that were not exposed to oxygen when outside Earth's atmosphere.
Meteoric nickel is found in combination with iron, a reflection of the origin of those elements as major end products of supernova nucleosynthesis. An iron–nickel mixture is thought to compose Earth's outer and inner cores.