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  2. Polyatomic ion - Wikipedia

    en.wikipedia.org/wiki/Polyatomic_ion

    A simple example of a polyatomic ion is the hydroxide ion, which consists of one oxygen atom and one hydrogen atom, jointly carrying a net charge of −1; its chemical formula is O H −. In contrast, an ammonium ion consists of one nitrogen atom and four hydrogen atoms, with a charge of +1; its chemical formula is N H + 4 .

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    en.wikipedia.org/wiki/List_of_free_PC_games

    March 1, 2006 March 1, 2006 Free to Play TrackMania Nations Forever: Nadeo Focus Interactive Racing video game: Microsoft Windows April 16, 2008 April 16, 2008 Free-to-Play Transcendence: Transformice: Atelier 801: Atelier 801 MMO, Platform: Microsoft Windows, macOS, Linux May 1, 2010 May 1, 2010 Free-to-play Tribes: Ascend: Tyrian 2000

  4. Pentazenium - Wikipedia

    en.wikipedia.org/wiki/Pentazenium

    In chemistry, the pentazenium cation (also known as pentanitrogen) is a positively-charged polyatomic ion with the chemical formula N + 5 and structure N−N−N−N−N.Together with solid nitrogen polymers and the azide anion, it is one of only three poly-nitrogen species obtained in bulk quantities.

  5. Isomer - Wikipedia

    en.wikipedia.org/wiki/Isomer

    The most common one in nature (myo-inositol) has the hydroxyls on carbons 1, 2, 3 and 5 on the same side of that plane, and can therefore be called cis-1,2,3,5-trans-4,6-cyclohexanehexol. And each of these cis - trans isomers can possibly have stable "chair" or "boat" conformations (although the barriers between these are significantly lower ...

  6. Resonance (chemistry) - Wikipedia

    en.wikipedia.org/wiki/Resonance_(chemistry)

    Contributing structures of the carbonate ion. In chemistry, resonance, also called mesomerism, is a way of describing bonding in certain molecules or polyatomic ions by the combination of several contributing structures (or forms, [1] also variously known as resonance structures or canonical structures) into a resonance hybrid (or hybrid structure) in valence bond theory.

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  9. IUPAC nomenclature of inorganic chemistry - Wikipedia

    en.wikipedia.org/wiki/IUPAC_nomenclature_of...

    The cation is always named first. Ions can be metals, non-metals or polyatomic ions. Therefore, the name of the metal or positive polyatomic ion is followed by the name of the non-metal or negative polyatomic ion. The positive ion retains its element name whereas for a single non-metal anion the ending is changed to -ide.

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