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Which of these is not a noble gas?

+1 vote
55 views
ANeon
BRadon
COxygen
DArgon

Correct Option: 3  

Explanation:
Oxygen
The noble gases are a group of chemical elements that under standard conditions are odourless, colourless, monatomic gases, with a very low chemical reactivity. The 6 noble gases that occur naturally are helium (He), neon (Ne), argon (Ar), krypton (Kr), xenon (Xe), and radon (Rn).
posted Feb 26, 2018 by Divya Bharti

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