inertness

In chemistry, inertness refers to a lack of activity or a state of passivity. This term is often associated with noble gases, which are elements in Group 18 of the periodic table, including helium, neon, and argon. These gases were historically called "inert gases" because it was believed they could not form chemical compounds.12

While some noble gases are abundant, like argon in Earth's atmosphere, the term "inert" is not entirely accurate as some can form compounds, such as xenon. The inertness of noble gases is due to their stable electron configuration, specifically a full outermost electron shell, which makes them reluctant to participate in chemical reactions. This property makes them useful in applications requiring a non-reactive environment, such as welding and lighting.32