Heavy gaseous element
Crossword Clue

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AnswerCrossword Clue
RADONHeavy, gaseous element
RADONHeavy, gaseous element.
radona heavy radioactive gaseous element formed by the decay of radium see element table
xenonsheavy, colorless, chemically inactive, monatomic gaseous element used for filling radio, television, and luminescent tubes. Symbol: Xe; at. wt.: 131.30; at. no.: 54
xenonheavy, colorless, chemically inactive, monatomic gaseous element used for filling radio, television, and luminescent tubes. Symbol: Xe; at. wt.: 131.30; at. no.: 54
xenona heavy colorless and relatively inert gaseous element that occurs in air as about one part in 20 million and is used especially in specialized electric lamps (as flashtubes) and in scientific research see element table