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  2. Polyatomic ion - Wikipedia

    en.wikipedia.org/wiki/Polyatomic_ion

    Polyatomic ions often are useful in the context of acid–base chemistry and in the formation of salts. Often, a polyatomic ion can be considered as the conjugate acid or base of a neutral molecule. For example, the conjugate base of sulfuric acid (H 2 SO 4) is the polyatomic hydrogen sulfate anion (HSO − 4).

  3. File:Periodic table (18-col, enwiki), black and white.png

    en.wikipedia.org/wiki/File:Periodic_table_(18...

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  4. File:Particle table.pdf - Wikipedia

    en.wikipedia.org/wiki/File:Particle_table.pdf

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  5. Periodic table - Wikipedia

    en.wikipedia.org/wiki/Periodic_table

    Periodic tables usually at least show the elements' symbols; many also provide supplementary information about the elements, either via colour-coding or as data in the cells. The above table shows the names and atomic numbers of the elements, and also their blocks, natural occurrences and standard atomic weights. For the short-lived elements ...

  6. Polyhalogen ions - Wikipedia

    en.wikipedia.org/wiki/Polyhalogen_ions

    Polyhalogen ions are a group of polyatomic cations and anions containing halogens only. The ions can be classified into two classes, isopolyhalogen ions which contain one type of halogen only, and heteropolyhalogen ions with more than one type of halogen.

  7. File:Periodic table (polyatomic).svg - Wikipedia

    en.wikipedia.org/wiki/File:Periodic_table...

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  8. Quaternary ammonium cation - Wikipedia

    en.wikipedia.org/wiki/Quaternary_ammonium_cation

    Quaternary ammonium cation. The R groups may be the same or different alkyl or aryl groups. Also, the R groups may be connected. In organic chemistry, quaternary ammonium cations, also known as quats, are positively-charged polyatomic ions of the structure [NR 4] +, where R is an alkyl group, an aryl group [1] or organyl group.

  9. File:Periodic table (polyatomic)-sr-lat.svg - Wikipedia

    en.wikipedia.org/wiki/File:Periodic_table...

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