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  2. Chemical formula - Wikipedia

    en.wikipedia.org/wiki/Chemical_formula

    A chemical formula is a way of presenting information about the chemical proportions of atoms that constitute a particular chemical compound or molecule, using chemical element symbols, numbers, and sometimes also other symbols, such as parentheses, dashes, brackets, commas and plus (+) and minus (−) signs.

  3. Glossary of chemical formulae - Wikipedia

    en.wikipedia.org/wiki/Glossary_of_chemical_formulae

    Chemical formula Synonyms CAS number CAgO carbonylsilver: CCl 2 F 2: dichlorodifluoromethane freon-12: 75-71-8 CCl 4: carbon tetrachloride tetrachloromethane: 56-23-5 C(CN) 4: tetracyanomethane: 24331-09-7 CFCl 3: trichlorofluoromethane freon-11: 75-69-4 CFCl 2 CF 2 Cl: chlorotrifluoromethane freon-13: 75-72-9 CHCl 3: chloroform ...

  4. Glossary of chemistry terms - Wikipedia

    en.wikipedia.org/wiki/Glossary_of_chemistry_terms

    Also acid ionization constant or acidity constant. A quantitative measure of the strength of an acid in solution expressed as an equilibrium constant for a chemical dissociation reaction in the context of acid-base reactions. It is often given as its base-10 cologarithm, p K a. acid–base extraction A chemical reaction in which chemical species are separated from other acids and bases. acid ...

  5. Lists of molecules - Wikipedia

    en.wikipedia.org/wiki/Lists_of_molecules

    This is an index of lists of molecules (i.e. by year, number of atoms, etc.). Millions of molecules have existed in the universe since before the formation of Earth. Three of them, carbon dioxide, water and oxygen were necessary for the growth of life.

  6. List of compounds with carbon number 20 - Wikipedia

    en.wikipedia.org/wiki/List_of_compounds_with...

    Chemical formula Synonyms CAS number C 20 F 42: perfluoroicosane: 37589-57-4 C 20 H 6 I 4 Na 2 O 5: erythrosine: 16423-68-0 C 20 H 12: perylene: 198-55-0 C 20 H 12: benz(e)acephenanthrylene: 205-99-2 [1] C 20 H 12 O 5: fluorescein: 2321-07-5 C 20 H 13 N 3 O 7: anthracene picric acid: 5937-78-0 C 20 H 14 NO 4: sanguinarine: 2447-54-3 C 20 H 14 O ...

  7. IUPAC nomenclature of inorganic chemistry - Wikipedia

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

    Similarly, H 2 O is most often simply called water in English, though other chemical names do exist. Single atom anions are named with an -ide suffix: for example, H − is hydride . Compounds with a positive ion ( cation ): The name of the compound is simply the cation's name (usually the same as the element's), followed by the anion.

  8. List of chemical compounds with unusual names - Wikipedia

    en.wikipedia.org/wiki/List_of_chemical_compounds...

    Chemical nomenclature, replete as it is with compounds with very complex names, is a repository for some names that may be considered unusual. A browse through the Physical Constants of Organic Compounds in the CRC Handbook of Chemistry and Physics (a fundamental resource) will reveal not just the whimsical work of chemists, but the sometimes peculiar compound names that occur as the ...

  9. Category:Chemical formulas - Wikipedia

    en.wikipedia.org/wiki/Category:Chemical_formulas

    This category contains articles on the various formulas used to express information about the atoms that constitute a particular chemical compound. Subcategories This category has the following 2 subcategories, out of 2 total.