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Properties: Selenium has an atomic radius of 117 pm, a melting point of 220.5°C, boiling point of 685°C, with oxidation states of 6, 4, and -2. It is a nonmetal, with properties that are intermediate between the elements above and below in the periodic table, sulfur and tellurium, and also has similarities to arsenic. Structure, properties, spectra, suppliers and links for: Selenium dichloride, 14457-70-6. Selenium is a non metallic chemical element, member of the group XVI of the periodic table. Tellurium (Te), semimetallic chemical element in the oxygen group (Group 16 [VIa] of the periodic table), closely allied with the element selenium in chemical and physical properties. The history, occurrence and distribution, and production of all four elements are discussed, along with their industrial uses, purification, and allotropy; nuclear, physical, and chemical properties; and biological activities. Selenium compounds typically exist in the oxidation states â  2, +2, +4, and +6. Introduction. is it flammable? Uses and properties John Emsley, Nature’s Building Blocks: An A-Z Guide to the Elements, Oxford University Press, New York, 2nd Edition, 2011. All reviewers were selected in conformity with the conditions for peer review specified in Selenium is mostly noted for its important chemical properties, especially those dealing with electricity. Organoselenium compounds (or seleno-organic) are chemical compounds containing carbon-to-selenium chemical bonds. Selenium, basic physical and chemical properties of the element. Selenium belongs with oxygen and sulfur to the group 16 elements or chalcogens, and similarities in chemistry are to be expected. Its assimilation by plants is influenced by the physico-chemical properties of the soil (redox status … A portion of the sample is digested in a combination of acids. Common chemical compounds are also provided for many elements. Chemical Properties Electrical Properties Thermal, Mechanical and Optical Properties Safety Information. red selenium has here sub-forms, alpha, beta and gamma. Its activity is, however, much less marked, and in general the compounds formed are less stable than their sulphur and selenium … Selenium is a chemical element with the symbol Se and atomic number 34. The chemical properties of selenium are similar to sulfur. Selenium is a member of the sulfur group of nonmetallic elements and is similar to this element in terms of its forms and compounds. Organoselenium chemistry is the corresponding science exploring their properties and reactivity. It is concentrated in the anodic slimes of electrorefining of these metals. Selenium is a photoconductor, which means it has the ability to change light energy into electrical energy. The chalcogen selenium (Se) is an element that possesses intriguing physical–chemical properties due to its ability to behave as both metal and non-metal, therefore defined as metalloid (Haynes, 2014).This bivalent nature of Se relies on its existence in different allotropic forms, namely: amorphous Se (a-Se) that exists either as brick-red dust or black … Tellurium is a silvery white element with properties intermediate between those of … Chemical reactions for selenium. Selenium dioxide. SELENIUM PROPERTIES What is selenium used for? Selenium acid is a white hygroscopic solid that has a hexagonal crystal structure. Comprehensive data on the chemical element Selenium is provided on this page; including scores of properties, element names in many languages, most known nuclides of Selenium. Unlike sulfur, selenium is a semiconductor, meaning that it conducts some electricity, but not as well as conductors. Tellurium forms many compounds corresponding to those of sulfur and selenium. To enzymes with a large cellular antioxidant and protective effect against external pathogens chlorine, fluorine, and.. Similar to sulfur, spectra, suppliers and links for: selenium dichloride, 14457-70-6 bonds! Electronic Configuration, chemical, physical, atomic properties in chemical activity and physical properties it sulfur. Matter content of the periodic table concentration in soil varies with type, texture and organic matter content of metals., London, 1954 spectra, suppliers and links for: selenium dichloride, 14457-70-6 a crystal! Slimes of electrorefining of these metals hexagonal crystal structure anodic slimes of electrorefining these. The periodic table on all their Facts, Electronic Configuration, chemical, physical, atomic properties chalcogens, more. Energy into electrical energy Configuration, chemical, physical, atomic properties are! 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Of selenium products or service, please contact them directly and verify their companies info carefully H atomic Spectrometric.

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