Gaseous elements tend to be located on the right side of the periodic table, particularly in the upper right corner. This includes all the noble gases in Group 18, which are monatomic gases, and several other gaseous elements that exist as diatomic molecules, such as hydrogen (H₂), nitrogen (N₂), oxygen (O₂), fluorine (F₂), and chlorine (Cl₂)

. To summarize:

• Noble gases (Group 18): Helium (He), neon (Ne), argon (Ar), krypton (Kr), xenon (Xe), and radon (Rn) are all gases at room temperature.
• Other gaseous elements: Hydrogen (though located on the left), nitrogen, oxygen, fluorine, and chlorine are gases at room temperature and pressure.
• These gaseous elements are mostly found in the upper right portion of the periodic table, except hydrogen which is in Group 1 but is gaseous due to its unique properties

Thus, gaseous elements cluster primarily on the right side, especially among the noble gases and some of the halogens and nonmetals.