Which of these is not a noble gas?

Question

ANeon

BRadon

COxygen

DArgon

Select from the options above.

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).