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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 [1]) 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.

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

    May 17, 2024 · noble gas, any of the seven chemical elements that make up Group 18 (VIIIa) of the periodic table. The elements are helium (He), neon (Ne), argon (Ar), krypton (Kr), xenon (Xe), radon (Rn), and oganesson (Og). The noble gases are colourless, odourless, tasteless, nonflammable gases.

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  7. 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.

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

    Jan 16, 2024 · The meaning of NOBLE GAS is 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.

  9. www.thoughtco.com › noble-gases-properties-andNoble Gases Properties, Uses and Sources - ThoughtCo

    May 30, 2019 · There are seven noble gas elements: helium, neon, argon, krypton, xenon, radon, and oganesson. Noble gases are the least reactive chemical elements. They are nearly inert because the atoms have a full valence electron shell, with little tendency to accept or donate electrons to form chemical bonds.

  10. chem.libretexts.org › Bookshelves › Inorganic8.14.2: Properties of Nobel Gases - Chemistry LibreTexts

    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.

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