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- DictionaryNo·ble gas/ˌnōb(ə)l ˈɡas/
noun
- 1. any of the gaseous elements helium, neon, argon, krypton, xenon, and radon, occupying Group 0 (18) of the periodic table. They were long believed to be totally unreactive but compounds of xenon, krypton, and radon are now known.
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The noble gases (historically the inert gases, sometimes referred to as aerogens) are the naturally occurring members of group 18 of the periodic table: helium (He), neon (Ne), argon (Ar), krypton (Kr), xenon (Xe), and radon (Rn).
May 23, 2020 · Noble gases are the elements in group 18 of the periodic table with filled valence shells. They are mostly inert, colorless, odorless, and monatomic gases that can form compounds under extreme conditions.
May 17, 2024 · Noble gas is a term for the seven chemical elements in Group 18 of the periodic table, such as helium, neon, and xenon. They are colourless, odourless, tasteless, nonflammable gases that are abundant in the universe but rare on Earth.
Jan 16, 2024 · Learn the meaning of noble gas, a group of rare gases that are very stable and unreactive. See examples of noble gas in sentences, word history, related articles, and more.
Jul 12, 2023 · The noble gases are characterized by their high ionization energies and low electron affinities. Potent oxidants are needed to oxidize the noble gases to form compounds in positive oxidation states. The noble gases have a closed-shell valence electron configuration.
noble gas. / nō ′ bəl /. Any of the six gases helium, neon, argon, krypton, xenon, and radon. Because the outermost electron shell of atoms of these gases is full, they do not react chemically with other substances except under certain special conditions. Also called inert gas.
8.14.2: Properties of Nobel Gases. The noble gases (Group 18) are located in the far right of the periodic table and were previously referred to as the "inert gases" due to the fact that their filled valence shells (octets) make them extremely nonreactive.
