The colorless, inert gases are also known as the noble gases. They are:

* Helium (He)

* Neon (Ne)

* Argon (Ar)

* Krypton (Kr)

* Xenon (Xe)

* Radon (Rn)

These gases are called inert because they are very unreactive due to their full outer electron shells. They are colorless, odorless, and tasteless under standard conditions.