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õhus leiduv värvuseta ja lõhnata väärisgaas, mida kasutatakse valgustite, valgusreklaamide ja laserite valmistamiseks, keemiline element järjenumbriga 36
chemical element, rare gas of Group 18 (noble gases) of the periodic table, väärisgaaside hulka kuuluv haruldane keemiline element, järjenr 36, aatomm 83,8