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chalcogenide

[kal-kuh-juh-nahyd, kal-koj-uh-] /ˈkæl kə dʒəˌnaɪd, kælˈkɒdʒ ə-/
noun
1.
Chemistry. a binary compound consisting of a chalcogen and a more electropositive element or radical.
Origin
chalcogen + -ide
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Encyclopedia Article for chalcogenides

chalcogenide

any of the five chemical elements comprising Group VIa of the periodic classification-namely, oxygen, sulfur, selenium, tellurium, and polonium. (See .) A relationship among the first three members of the group was recognized as early as 1829; tellurium was assigned its place by 1865, and the discovery of polonium in 1898 completed the group. By the early 1970s, the possibility of finding element 116, the next member of Group VIa, in nature appeared to be negligible.

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Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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