Enter a clue or pattern or both:
The Clue
Elementary gases (6 letter answer)
The Answer
XENONS
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Notes
The answer XENONS is so rare that it appears less than once every 2900 puzzles.
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Popular headlights
Some gas atoms, informally
Some gas atoms
Definition
XENON as a noun:
1. (xenon, Xe, atomic number 54) = a colorless odorless inert gaseous element occurring in the earth's atmosphere in trace amounts