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Metalloids are metallic-looking, often brittle solids that are either semiconductors or exist in semiconducting forms, and have amphoteric or weakly acidic oxides. Typical elemental nonmetals have a dull, coloured or colourless appearance; are often brittle when solid; are poor conductors of heat and electricity; and have acidic oxides. Most or ...
A metalloid is a chemical element which has a preponderance of properties in between, ... Metalloids are too brittle to have any structural uses in their pure forms ...
As a metalloid, its chemistry is largely covalent in nature, noting it can form brittle alloys with metals, and has an extensive organometallic chemistry. Most alloys of arsenic with metals lack metallic or semimetallic conductivity. The common oxide of arsenic (As 2 O 3) is acidic but weakly amphoteric. Antimony, showing its brilliant lustre
Many of the nonmetallic elements are hard and brittle, [21] where dislocations cannot readily move so they tend to undergo brittle fracture rather than deforming. [48] Some do deform such as white phosphorus (soft as wax, pliable and can be cut with a knife, at room temperature), [ 49 ] in plastic sulfur , [ 50 ] and in selenium which can be ...
Arsenic is a moderately hard (MH 3.5) and brittle semi-metallic element. It is commonly regarded as a metalloid, or by some other authors as either a metal or a non-metal. It exhibits poor electrical conductivity which, like a metal, decreases with temperature. It has a relatively open and partially covalent crystalline structure (BCN 3+3).
Metalloids Nonmetals [1] Form and structure: Colour nearly all are shiny and grey-white; ... often brittle; some (C, P, S, Se) have non-brittle forms [n 4] Poisson's ...
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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, resistant to corrosion, or have a more desirable color and luster.