In order of highest to lowest concentration they are Nitrogen Oxygen Argon Carbon dioxide Neon Helium Methane CH 4 Krypton Hydrogen and Xenon.

Example of what gas is. This pressure is because of the bombardment of the particles against the walls of the vessel Figure. The most common example of a gas is air the air we breathe is a gas. Mixed gases on the other hand consist of more than one kind of pure gas.

Iii Carbon dioxide iv Methane biproduct of mammalian metabolism. Water vapor and air are examples of gas. However it is an elemental molecule.

A few have already been mentioned such as steam and helium. Like a gas plasma lacks a defined shape or volume. However there is a problem.

It actually contains more of fumes and chemicals. A gas lacks either a defined shape or volume. Pure gases may also be compound molecules which are comprised of a bunch of different atoms.

Liquids apply pressure downward as well as to the sides. These are the elements that exist as gases at standard temperature and pressure. For example carbon dioxide would be considered a pure gas but it is also a compound molecule.

For example carbon dioxide would be considered a pure gas but it is also a compound molecule. A gas is a state of matter that has no fixed volume or shape. Pure and Mixed Gases.