There are 7 solutions. The longest is DEUTERIUM with 9 letters, and the shortest is UREY with 4 letters.
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No, "HEAVY HYDROGEN" hasn´t seen a spike right now. Solvers are most interested in: Signal, Jot, Follow, Heap praise upon and Essential.
Solutions are between 4 and 9 letters long.
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| isotope of hydrogen twice as heavy as the normal atom | ||