What is nonmetal?

  • (adj): Not containing or resembling or characteristic of a metal.
    Synonyms: nonmetallic
    See also — Additional definitions below


Nonmetal, or non-metal, is a term used in chemistry when classifying the chemical elements. On the basis of their general physical and chemical properties, every element in the periodic table can be termed either a metal or a nonmetal. (A few elements with intermediate properties are referred to as metalloids).

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Some articles on nonmetal:

Nonmetal - Metallic Allotropes
... Among the nonmetals, many possess metallic allotropes under high pressure, while some metals may exist in nonmetallic allotropes Element Period Group Classification Allotropes Hydrogen 1 ... other ... Carbon 14 ... other nonmetal A metallic allotrope of carbon has been hypothesized to occur at 1.1 TPa ... Nitrogen 15 ... other nonmetal There has been some theoretical consideration of a high-pressure metallic allotrope ...
Chemistry - Ionic Bonding
... most common type of ionic bonding is seen in compounds of metals and nonmetals (except noble gases, which rarely form chemical compounds) ... is combined with a highly electronegative nonmetal, the extra electrons from the metal atoms are transferred to the electron-deficient nonmetal atoms ... This reaction produces metal cations and nonmetal anions, which are attracted to each other to form a salt ...
Elements Less Commonly Recognized As Metalloids - Astatine
... Astatine may be a nonmetal or a metalloid ... It is ordinarily classified as a nonmetal, but has some 'marked' metallic properties ... In 1949 it was called the most noble (difficult to reduce) nonmetal as well as being a relatively noble (difficult to oxidize) metal ...
Pyrophoricity - Pyrophoric Materials - Solids
... Alkylated metal alkoxides or nonmetal halides (diethylethoxyaluminium, dichloro(methyl)silane) Alkali metals (lithium, sodium, potassium, rubidium, caesium) (Inclu ... of the adsorbed hydrogen) Metal hydrides or nonmetal hydrides (germane, diborane, sodium hydride, lithium aluminium hydride, uranium trihydride) Iron sulfide often encountered in oil and ... Partially or fully alkylated derivatives of metal and nonmetal hydrides (diethylaluminium hydride, trimethylaluminium, triethylaluminium, butyllithium ...
Period 2 Element - Elements
2s2 5 B Boron Metalloid 2s2 2p1 6 C Carbon Nonmetal 2s2 2p2 7 N Nitrogen Nonmetal 2s2 2p3 8 O Oxygen Nonmetal 2s2 2p4 9 F Fluorine Halogen 2s2 2p5 10 Ne Neon Noble gas 2s2 2p6 ...

More definitions of "nonmetal":

  • (noun): A chemical element lacking typical metallic properties.