Crossword clue: a colorless element that is one of the six inert gasses; occurs in trace amounts in air

The most common answer is krypton (7 letters).

1 answer found in Letterora's clue database (Wikidata facts, Open Trivia DB, WordNet and Webster definitions — all licensed sources).

Possible answers

krypton 7 letters wn-def

a colorless element that is one of the six inert gasses; occurs in trace amounts in air