What is another word for inert gas?
Pronunciation: [ɪnˈɜːt ɡˈas] (IPA) 
Inert gas is a term used to describe a group of gases that are chemically inactive under normal conditions. Some common synonyms for inert gas are noble gas, rare gas, and aerogen. The term noble gas is often used because these gases were once considered to be too refined and distant to react with other substances; hence, they were thought to be aristocratic or noble. Rare gas is also a synonym for inert gas, referring to the fact that these gases are found in small amounts in the atmosphere. Aerogens are used less frequently to describe inert gases, but the term refers to the gas's ability to support combustion or the existence of an atmosphere.
