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  2. Nickel - Wikipedia

    en.wikipedia.org/wiki/Nickel

    Nickel is a chemical element; it has symbol Ni and atomic number 28. It is a silvery-white lustrous metal with a slight golden ... Pure nickel is chemically reactive, ...

  3. Reactivity series - Wikipedia

    en.wikipedia.org/wiki/Reactivity_series

    The most reactive metals, such as sodium, will react with cold water to produce hydrogen and the metal hydroxide: 2 Na (s) + 2 H 2 O (l) →2 NaOH (aq) + H 2 (g) Metals in the middle of the reactivity series, such as iron , will react with acids such as sulfuric acid (but not water at normal temperatures) to give hydrogen and a metal salt ...

  4. Nickel compounds - Wikipedia

    en.wikipedia.org/wiki/Nickel_compounds

    Nickel compounds are chemical compounds containing the element nickel which is a member of the group 10 of the periodic table. Most compounds in the group have an oxidation state of +2. Nickel is classified as a transition metal with nickel(II) having much chemical behaviour in common with iron(II) and cobalt(II).

  5. Reactivity (chemistry) - Wikipedia

    en.wikipedia.org/wiki/Reactivity_(chemistry)

    In chemistry, reactivity is the impulse for which a chemical substance undergoes a chemical reaction, either by itself or with other materials, with an overall release of energy. Reactivity refers to: the chemical reactions of a single substance, the chemical reactions of two or more substances that interact with each other,

  6. Rieke metal - Wikipedia

    en.wikipedia.org/wiki/Rieke_metal

    The use of highly reactive metals in chemical synthesis was popularized in the 1960s. One development in this theme is the use of metal vapor synthesis, as described by Skell, [citation needed] Timms, [11] Ozin, [citation needed] and others. All of these methods relied on elaborate instrumentation to vaporize the metals, releasing an atomic ...

  7. Noble metal - Wikipedia

    en.wikipedia.org/wiki/Noble_metal

    Abundance of the chemical elements in the Earth's crust as a function of atomic number. The rarest elements (shown in yellow, including the noble metals) are not the heaviest, but are rather the siderophile (iron-loving) elements in the Goldschmidt classification of elements. These have been depleted by being relocated deeper into the Earth's core.

  8. Metal - Wikipedia

    en.wikipedia.org/wiki/Metal

    A sculpture cast in nickel silver—an alloy of copper, nickel, and zinc that looks like silver Most pure metals are either too soft, brittle, or chemically reactive for practical use. Combining different ratios of metals and other elements in alloys modifies the properties to produce desirable characteristics, for instance more ductile, harder ...

  9. Chemical element - Wikipedia

    en.wikipedia.org/wiki/Chemical_element

    A chemical element is a chemical substance whose atoms all have the same number of protons. ... Nickel 28 Ni 58.693: Copper 29 Cu ... Reactive metals such as lithium ...