noble gas

noun

: any of a group of rare gases that include helium, neon, argon, krypton, xenon, and usually radon and that exhibit great stability and extremely low reaction rates

called also inert gas

Examples of noble gas in a Sentence

Recent Examples on the Web

When a nucleus has a magic number of protons or neutrons, then the particular orbit is filled, and the nucleus is not very reactive, similar to the noble gases. —Artemis Spyrou, Discover Magazine, 9 Oct. 2024

One class of elements, the noble gases, hardly ever react with other elements. —Artemis Spyrou, The Conversation, 7 Oct. 2024

It is known that the inert noble gas xenon can act as anesthetic in animals and people. —Hartmut Neven, Scientific American, 8 Aug. 2024

At room temperature, flerovium forms a strong bond with gold, very unlike a noble gas. —Stephanie Pappas, Scientific American, 14 May 2024

Word History

First Known Use

1902, in the meaning defined above

Medical Definition

noble gas

noun

no·​ble gas ˈnō-bəl- 

: any of a group of rare gases that include helium, neon, argon, krypton, xenon, and sometimes radon and that exhibit great stability and extremely low reaction rates

called also inert gas