Crossword Genius

Ir doesn't react very well (4,3)


I believe the answer is:

rare gas

(Other definitions for rare gas that I've seen before include "Such as neon, argon, etc" , "Element such as helium, neon etc" , "Such as argon or xenon" , "Eg, helium or neon" .)

I've seen this clue in the Newsday.
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