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  1. Dictionary
    No·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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  3. en.wikipedia.org › wiki › Noble_gasNoble gas - Wikipedia

    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).

  4. sciencenotes.org › what-are-noble-gases-definitionWhat Are Noble Gases? Definition and Properties

    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.

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  6. www.britannica.com › science › noble-gasNoble gas | Definition, Elements, Properties, Characteristics ...

    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.

  7. www.merriam-webster.com › dictionary › noble gasNoble gas Definition & Meaning - Merriam-Webster

    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.

  8. byjus.com › chemistry › what-are-noble-gasesWhat are Noble Gases? - BYJU'S

    The noble gases, also known as the inert gases and aerogens, are the elements that belong to group 18 of the modern periodic table. The elements that belong to this group are: Under standard conditions for temperature and pressure, all the noble gases exist in the gaseous phase.

  9. chem.libretexts.org › Bookshelves › General_Chemistry22.2: Group 18 - The Noble Gases - Chemistry LibreTexts

    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.

  10. www.britannica.com › science › noble-gasNoble gas - Properties, Uses, Reactions | Britannica

    Several important uses of the noble gases depend on their reluctance to react chemically. Their indifference toward oxygen, for example, confers utter nonflammability upon the noble gases. Although helium is not quite as buoyant as hydrogen, its incombustibility makes it

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