The origin and usage of the term metalloid is convoluted. Its origin lies in attempts, dating from antiquity, to describe metals and to distinguish between typical and less typical forms. It was first applied to metals that floated on water (lithium, sodium and potassium), and then more popularly to nonmetals. Only recently, since the mid-20th century, has it been widely used to refer to elements with intermediate or borderline properties between metals and nonmetals.
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Theoriginand usage ofthetermmetalloid is convoluted. Its origin lies in attempts, dating from antiquity, to describe metals and to distinguish between...
definition of a metalloidand no complete agreement on which elements are metalloids. Despite the lack of specificity, theterm remains in use in the literature...
times and were powdered for use as medicine and cosmetics, often known by the Arabic name kohl. The earliest known description ofthemetalloid in the West...
suggest the names Kalium and Natronium, if one would not rather continue with the appellations Kali-metalloidand Natron-metalloid which are used by Mr...
elements (metalloids) are sometimes counted as nonmetals. The two lightest nonmetals, hydrogen and helium, together make up about 98% ofthe mass ofthe observable...
atomic weights, or atomic numbers. The criteria used, and whether metalloids are included, vary depending on the author and context. In metallurgy, for example...
toxic metalloid. It has various allotropes, but only the grey form, which has a metallic appearance, is important to industry. The primary useof arsenic...
hydroxide is in fact more basic than that of gallium. Aluminium also bears minor similarities to themetalloid boron in the same group: AlX3 compounds are valence...
have some properties characteristic of both. They are often termed semimetals or metalloids. Theterm "semimetal" used in this sense should not be confused...
inexact as the boundaries between metals, nonmetals, andmetalloids fluctuate slightly due to a lack of universally accepted definitions ofthe categories...
Latin (as used by Berzelius) and English names of elements have different roots. Eight of them are the seven metals of antiquity and a metalloid also known...
formations). Theterm allotropy is used for elements only, not for compounds. The more general term, used for any compound, is polymorphism, although its use is...
organic and inorganic domains. It combines with metals, nonmetals, metalloids, and most noble gases, and almost exclusively assumes an oxidation state of −1...
in Wiktionary, the free dictionary. Heavy metal may refer to: Heavy metals, a loose category of relatively dense metals andmetalloids Toxic heavy metal...
the six platinum group elements plus Au, Re, and Te (a metalloid) – in the yellow field. These are rare in the crust from being soluble in iron and thus...
that is harmful or lethal to living organisms. Theterm is used in a wide range of scientific fields and industries, where it is often specifically defined...
(usually Fe, Co, or Ni) and a metalloid component (B, C, Si, P, or Al) that lowers the melting point. A relatively new class of exceptionally strong ferromagnetic...
overdose in the United States. The US Food and Drug Administration (FDA) has subsequently issued a black box warning regarding concurrent useof benzodiazepines...
History oftheOriginofthe Chemical Elements and Their Discoverers Last updated by Boris Pritychenko on March 30, 2004 History of Elements ofthe Periodic...
death. The classically described "cherry red skin" rarely occurs. Long-term complications may include chronic fatigue, trouble with memory, and movement...
property of nitrogen gas. It can also be used as a mnemonic for the two most common members, P and N. Theterm "pnictogen" was suggested by the Dutch chemist...
on a worldwide basis. Inorganic arsenic is the most common type of arsenic in soil and water. Themetalloid arsenic can occur naturally in groundwater...
but advice unchanged]. Archived from the original on 5 June 2009. Keddy, P.A. 2007. Plants and Vegetation: Origins, Processes, Consequences. Cambridge...
Respiration on Tellurate and Other Metalloids in Bacteria from Hydrothermal Vent Fields in the Eastern Pacific Ocean". Applied and Environmental Microbiology...
shells are filled and explains the periodicity ofthe periodic table. British chemist Charles Bury is credited with the first useoftheterm transition metal...
mildly toxic metalloid that is primarily used as a machining additive to steel. Te is almost exclusively obtained as a by-product of copper refining...
Navas-Acien, A; Aherrera, A (March 2020). "Metal/Metalloid Levels in Electronic Cigarette Liquids, Aerosols, and Human Biosamples: A Systematic Review". Environmental...
Řanda, Z.; Greňová, I.; Borovička, J. (2016). "Bioaccumulation of heavy metals, metalloids, and chlorine in ectomycorrhizae from smelter-polluted area". Environmental...
introduced in 1787, is of Cuban Spanish originand originally referred to the gastropod Cittarium pica. Hallmark symptoms of ciguatera in humans include gastrointestinal...