Nickel

Nickel

1. A hard malleable ductile silvery metallic element that is resistant to corrosion; used in alloys; occurs in pentlandite and smaltite and garnierite and millerite. Because of nickel's slow rate of oxidation at room temperature, it is considered corrosion-resistant.
2. A US coin worth one twentieth of a dollar. A candy bar costs a nickel in 1940.

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Shown is a nickel coin (value is 5 cents, U.S.)