Answer:
helium , argon ,neon ,etc.
the six naturally occurring noble gases are helium ( He), neon ( Ne), argon (Ar), Krypton ( Kr),
xenon ( Xe), and the radioactive rondon ( Rn).
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Answer:
helium , argon ,neon ,etc.
Answer:
the six naturally occurring noble gases are helium ( He), neon ( Ne), argon (Ar), Krypton ( Kr),
xenon ( Xe), and the radioactive rondon ( Rn).