noun
EXAMPLES FROM CORPUS
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A compromise was needed; a mixture of krypton and argon proved suitable.
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A good choice is one of the inert gases; neon, argon, krypton , or xenon.
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For matrix materials like methane, nitrogen, krypton and xenon, this is not too surprising.
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Physical trapping is likely to be about as effective for neon, argon and krypton .
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There are also tiny traces of other noble gases besides argon, namely, neon, krypton , and xenon.
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They are the noble gases: neon, argon, krypton , xenon, and radon.