Category:ru:Chalcogens
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Russian terms for chemical elements in group 16 of the periodic table, which all have 6 valence electrons.
NOTE: This is a set category. It should contain terms for chalcogens, not merely terms related to chalcogens. It may contain more general terms (e.g. types of chalcogens) or more specific terms (e.g. names of specific chalcogens), although there may be related categories specifically for these types of terms.