The clue "Hazardous inert gas" last appeared in the USA Today crossword on March 28, 2019. The correct answer for this puzzle is "RADON", a 5-letter word.
Solution RADON is 5 letters long. So far we haven´t got a solution of the same word length.
There is 1 solutions. The longest is RADON with 5 letters, and the shortest is RADON with 5 letters.
No, "HAZARDOUS INERT GAS" hasn´t seen a spike right now. Solvers are most interested in: Signal, Jot, Follow, Heap praise upon and Essential.
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The solution is 5 letters long.