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You are most likely talking about the unreactive gases in the periodic table of elements. The Periodic Table of elements only contain elements (cannot be broken down into simpler substances).

In the periodic table, we have metals, non-metals and metalloids. Metals are usually solids in room temperature (other than Mercury). So the gases are in the non-metals section.

An unreactive gas would most commonly be found in group 18 (last column) on the periodic table of elements. These are the noble gases, and have 8 electrons on their outer shell, so they are very stable. Since they are stable, they are unreactive. They rarely react with other chemicals.

So the unreactive gases - group 18.(noble gases)

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12y ago

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