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nonmetal    
n. 非金属

非金属

nonmetal
adj 1: not containing or resembling or characteristic of a
metal; "nonmetallic elements" [synonym: {nonmetallic},
{nonmetal}] [ant: {metal(a)}, {metallic}]
n 1: a chemical element lacking typical metallic properties


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  • Nonmetal - Wikipedia
    In the context of the periodic table, a nonmetal is a chemical element that mostly lacks distinctive metallic properties They range from colorless gases like hydrogen to shiny crystals like iodine
  • Nonmetal | Definition, Properties, Examples, Facts | Britannica
    nonmetal, in physics, a substance having a finite activation energy (band gap) for electron conduction This means that nonmetals display low (insulators) to moderate (semiconductors) bulk electrical conductivities, which increase with increasing temperature, and are subject to dielectric breakdown at high voltages and temperatures
  • Metals, Metalloids, and Nonmetals - Element Classification Groups
    Nonmetals are usually dull, poor conductors of heat and electricity, brittle when solid, and often have lower melting and boiling points Metalloids have properties that are intermediate between metals and nonmetals, making them useful in semiconductor applications
  • Nonmetals - Chemistry Learner
    Nonmetals are those elements in the periodic table that do not have the typical characteristics of metals such as electrical conductivity, hardness, and ductility [1] Where are nonmetals located in the periodic table?
  • Nonmetals Definition and Properties - ThoughtCo
    Nonmetal elements are defined by their lack of metal properties Learn which elements fit this definition and how to identify their characteristics
  • The Chemistry of Nonmetals
    Once the metals and semimetals are removed from the list of known elements, only 17 are left to be classified as nonmetals Six of these elements belong to the family of rare gases in Group VIIIA, most of which are virtually inert to chemical reactions
  • Characteristics of Nonmetals - Chemistry LibreTexts
    In the elemental form, non-metals can be gas, liquid or solid They aren't shiny (lustrous) and they don't conduct heat or electricity well Usually their melting points are lower than for metals, although there are exceptions The solids usually break easily, and can't bend like metals





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