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 forms on the surface that prevents further corrosion. 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.
Phoenix most often refers to:
NIH is the National Institutes of Health in the United States.
Nis, Niš, NiS or NIS may refer to:
A shield is a hand-held protective device meant to intercept attacks.
NIB, nib or NiB may refer to:
Pi or π is a mathematical constant equal to a circle's circumference divided by its diameter.
Bao, also known as baozi, is a type of Chinese dumpling made of steamed or baked bun with fillings.
Nickel(II) oxide is the chemical compound with the formula NiO. It is the principal oxide of nickel. It is classified as a basic metal oxide. Several million kilograms are produced annually of varying quality, mainly as an intermediate in the production of nickel alloys. The mineralogical form of NiO, bunsenite, is very rare. Other nickel oxides have been claimed, for example: [Nickel(III) oxide](Ni
2O
3) and NiO
2, but they have yet to be proven by X-ray crystallography in bulk.. Nickel(III) oxide nanoparticles have recently (2015) been characterized using powder X-ray diffraction and electron microscopy.
Nios or NIOS may refer to:
NIAS or Nias may refer to:
Nickel tungstate is an inorganic compound of nickel, tungsten and oxygen, with the chemical formula of NiWO4.
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