Noble Gases

* Helium (He)

* Neon (Ne)

* Argon (Ar)

* Krypton (Kr)

* Xenon (Xe)

* Radon (Rn)

Other Elemental Gases

* Hydrogen (H₂)

* Nitrogen (N₂)

* Oxygen (O₂)

* Fluorine (F₂)

* Chlorine (Cl₂)

Important Notes:

* Diatomic Molecules: Some elements exist as diatomic molecules, meaning two atoms of the same element bond together. This is the case for hydrogen, nitrogen, oxygen, fluorine, and chlorine.

* Not Compounds: Elements cannot be broken down into simpler substances. This distinguishes them from compounds, which are formed from two or more elements. For example, carbon dioxide (CO₂) is a compound because it's made of carbon and oxygen.

Let me know if you have any other questions!