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Clue: "About 1% of the Earth's atmosphere"
"About 1% of the Earth's atmosphere" is a New York Times crossword puzzle clue that we have seen 1 time.
Possible answer
ARGON
Likely related crossword puzzle clues
Inert gas
Laser gas
Number 18
It's inert
Light bulb gas
Radio tube gas
Vacuum tube filler
Gas in a vacuum tube
Most common inert gas
Most common noble gas
<--, on the periodic table
Part of the atmosphere
Fluorescent bulb filler
Fluorescent lamp filler
Its atomic number is 18
Show more
Recent usage in crossword puzzles
New York Times -
January 11, 2004