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2. Chemical compound - Wikipedia

   en.wikipedia.org/wiki/Chemical_compound

   Pure water (H 2 O) is an example of a compound. The ball-and-stick model of the molecule shows the spatial association of two parts hydrogen (white) and one part oxygen (red) A chemical compound is a chemical substance composed of many identical molecules (or molecular entities ) containing atoms from more than one chemical element held ...

3. Glossary of chemical formulae - Wikipedia

   en.wikipedia.org/wiki/Glossary_of_chemical_formulae

   Print/export Download as PDF; ... This is a list of common chemical compounds with chemical formulae and CAS numbers, ... Ac 2 O 3: actinium(III) oxide: 12002-61-8

4. List of compounds - Wikipedia

   en.wikipedia.org/wiki/List_of_compounds

   Relevant links for chemical compounds are: Chemical Abstracts Service, a division of the American Chemical Society Chemical Abstracts Service (CAS) – substance databases; CAS Common Chemistry; ChemSpider; PubChem

5. Molecule - Wikipedia

   en.wikipedia.org/wiki/Molecule

   A compound's empirical formula is a very simple type of chemical formula. [27] It is the simplest integer ratio of the chemical elements that constitute it. [28] For example, water is always composed of a 2:1 ratio of hydrogen to oxygen atoms, and ethanol (ethyl alcohol) is

6. 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 ...

7. Chemical composition - Wikipedia

   en.wikipedia.org/wiki/Chemical_composition

   Chemical formulas can be used to describe the relative amounts of elements present in a compound. For example, the chemical formula for water is H 2 O: this means that each molecule of water is constituted by 2 atoms of hydrogen (H) and 1 atom of oxygen (O). The chemical composition of water may be interpreted as a 2:1 ratio of hydrogen atoms ...

8. Chemical similarity - Wikipedia

   en.wikipedia.org/wiki/Chemical_similarity

   The similarity-based [4] virtual screening (a kind of ligand-based virtual screening) assumes that all compounds in a database that are similar to a query compound have similar biological activity. Although this hypothesis is not always valid, [ 5 ] quite often the set of retrieved compounds is considerably enriched with actives. [ 6 ]

9. Hydroxy group - Wikipedia

   en.wikipedia.org/wiki/Hydroxy_group

   The hydroxy group is pervasive in chemistry and biochemistry. Many inorganic compounds contain hydroxyl groups, including sulfuric acid, the chemical compound produced on the largest scale industrially. [2] Hydroxy groups participate in the dehydration reactions that link simple biological molecules into long chains.