There are 11 elements that exist as gases at ordinary conditions (room temperature and pressure). These are:

* Noble Gases: Helium (He), Neon (Ne), Argon (Ar), Krypton (Kr), Xenon (Xe), Radon (Rn)

* Diatomic Gases: Hydrogen (H₂), Nitrogen (N₂), Oxygen (O₂), Fluorine (F₂), Chlorine (Cl₂)