What is nickel?

  • (noun): A United States coin worth one twentieth of a dollar.
    See also — Additional definitions below


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. Pure nickel shows a significant chemical activity that can be observed when nickel is powdered to maximize the exposed surface area on which reactions can occur, but larger pieces of the metal are slow to react with air at ambient conditions due to the formation of a protective oxide surface. Even then, nickel is reactive enough with oxygen so that native nickel is rarely found on Earth's surface, being mostly confined to the interiors of larger nickel–iron meteorites that were protected from oxidation during their time in space. On Earth, such native nickel is always found in combination with iron, a reflection of those elements' origin as major end products of supernova nucleosynthesis. An iron–nickel mixture is thought to compose Earth's inner core.

Read more about Nickel.

Some articles on nickel:

Colored Gold - White Gold
... White gold is an alloy of gold and at least one white metal, usually nickel, manganese or palladium ... As a result, white gold alloys can be used for many different purposes while a nickel alloy is hard and strong and therefore good for rings and pins, gold-palladium alloys are soft, pliable and good for white gold ... A common white gold formulation consists of 90 wt.% gold and 10 wt.% nickel ...
Ca Nickel
... In 2008, Crowflight Minerals was in the process of opening the Bucko Lake nickel mine near Wabowden, Manitoba, which would produce 1,000 tonnes per day of ore, which will ...
Londonite - Nickel–Strunz Classification -06- Borates
... This list uses it to modify the Classification of Nickel–Strunz (10 ed, pending publication) ... leaf) Tekto three-dimensional framework Nickel–Strunz code scheme NN.XY.##x NN Nickel–Strunz mineral class number X Nickel–Strunz mineral division letter Y Nickel–Strunz ...
Low Level Bridge (Fairmont, West Virginia)
... The bridge was called the "Nickel Bridge" because one had to pay a nickel toll in order to cross it ... Mollohan-Jefferson Street Bridge which was on a "higher span" than the nickel bridge was ...
Nickel - Toxicity
... In the US, the minimal risk level of nickel and its compounds is set to 0.2 µg/m3 for inhalation during 15–364 days ... Nickel sulfide fume and dust are believed carcinogenic, and various other nickel compounds may be as well ... Nickel carbonyl, is an extremely toxic gas ...

More definitions of "nickel":

  • (verb): Plate with nickel.
    Example: "Nickel the plate"
  • (noun): A hard malleable ductile silvery metallic element that is resistant to corrosion; used in alloys; occurs in pentlandite and smaltite and garnierite and millerite.
    Synonyms: Ni, atomic number 28
  • (noun): Five dollars worth of a drug.
    Example: "A nickel bag of drugs"; "a nickel deck of heroin"
    Synonyms: nickel note

Famous quotes containing the word nickel:

    Castro couldn’t even go to the bathroom unless the Soviet Union put the nickel in the toilet.
    Richard M. Nixon (1913–1995)