Noble gases are a group of inert, nonreactive elements in Group 18 of the periodic table. They are characterized by having complete valence electron shells, making them highly stable.
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Noble gases include helium (He), neon (Ne), argon (Ar), krypton (Kr), xenon (Xe), and radon (Rn).
They are colorless, odorless, and tasteless under standard conditions.
Noble gases have very low chemical reactivity due to their filled outer electron shells.
Helium is used in cryogenics and as a cooling medium for nuclear reactors.
Argon is commonly used in welding and in incandescent light bulbs to prevent oxidation of the filament.