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JavaRogers (talk | contribs) Etymology: Swapped Greek & latin text so the latin is in the sentence, Greek is parenthetical (for the wider audience who cannot read Greek). Linked Greek to Wiktionary. Tags: Mobile edit Mobile web edit Advanced mobile edit |
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{{Good article}}
{{Infobox selenium}}
'''Selenium''' is a [[chemical element]] with the [[Symbol (chemistry)|symbol]] '''Se''' and [[atomic number]] 34. It is a [[nonmetal]] (more rarely considered a [[metalloid]]) with properties that are intermediate between the elements above and below in the [[periodic table]], [[sulfur]] and [[tellurium]], and also has similarities to [[arsenic]]. It rarely occurs in its elemental state or as pure ore compounds in the Earth's crust. Selenium—from [[Ancient Greek|Greek]] {{
Selenium is found in [[:Category:Sulfide minerals|metal sulfide ores]], where it partially replaces the sulfur. Commercially, selenium is produced as a byproduct in the refining of these ores, most often during production. Minerals that are pure selenide or selenate compounds are known but rare. The chief commercial uses for selenium today are [[glassmaking]] and [[pigment]]s. Selenium is a [[semiconductor]] and is used in [[photocell]]s. Applications in [[electronics]], once important, have been mostly replaced with [[silicon]] semiconductor devices. Selenium is still used in a few types of DC power [[surge protector]]s and one type of [[Fluorescence|fluorescent]] [[quantum dot]].
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