The nobel gasses can be made to react under somewhat extreme circumstances, but they do not readily react on their own with other elements because they have a complete outer shell, which is to say they have 8 electrons in their highest energy level. This means they are completely stable, neither looking to borrow electrons, nor to give any away.
they do not for compounds except for xenon, krypton and argon. These compounds are all very unstable. The first compounds of xenon and krypton were found 50 years ago, and compounds of argon only in the last 15 years.
nobel gasses
Nobel gasses.
Radon is one of the noble gasses. As such, it exists naturally in its elemental state and does not easily form compounds.
Noble gasses
The Nobel gasses. Generally inert.
element, last of the nobel gasses on the periodic table of elements
Some gasses are elements, such as oxygen and nitrogen. Some gasses are compounds of multiple elements put together, such as carbon dioxide.
The Noble gasses.
The noble gasses are found in the right-most column (group 18) on the period table.
Some of it is atmospheric gasses, some of it (often a quite large part) is methane, and a small percentage is other organic compounds. The "other organic compounds" is the part that's responsible for the smell; methane itself is odorless.
No. Gas is a state of matter. Gasses can be elements, compounds, or mixtures.