chalcogen

noun
chal·co·gen | \ˈkal-kə-jən \

Definition of chalcogen 

: any of the elements oxygen, sulfur, selenium, and tellurium

First Known Use of chalcogen

1940, in the meaning defined above

History and Etymology for chalcogen

International Scientific Vocabulary chalk- bronze, ore (from Greek chalkos) + -gen; from the occurrence of oxygen and sulfur in many ores

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The first known use of chalcogen was in 1940

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