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- Chemical_reaction abstract "A chemical reaction is a process that leads to the transformation of one set of chemical substances to another. Classically, chemical reactions encompass changes that only involve the positions of electrons in the forming and breaking of chemical bonds between atoms, with no change to the nuclei (no change to the elements present), and can often be described by a chemical equation. Nuclear chemistry is a sub-discipline of chemistry that involves the chemical reactions of unstable and radioactive elements where both electronic and nuclear changes may occur.The substance (or substances) initially involved in a chemical reaction are called reactants or reagents. Chemical reactions are usually characterized by a chemical change, and they yield one or more products, which usually have properties different from the reactants. Reactions often consist of a sequence of individual sub-steps, the so-called elementary reactions, and the information on the precise course of action is part of the reaction mechanism. Chemical reactions are described with chemical equations, which graphically present the starting materials, end products, and sometimes intermediate products and reaction conditions.Chemical reactions happen at a characteristic reaction rate at a given temperature and chemical concentration, and rapid reactions are often described as spontaneous, requiring no input of extra energy other than thermal energy. Non-spontaneous reactions run so slowly that they are considered to require the input of some type of additional energy (such as extra heat, light or electricity) in order to proceed to completion (chemical equilibrium) at human time scales.Different chemical reactions are used in combinations during chemical synthesis in order to obtain a desired product. In biochemistry, a similar series of chemical reactions form metabolic pathways. These reactions are often catalyzed by protein enzymes. These enzymes increase the rates of biochemical reactions, so that metabolic syntheses and decompositions impossible under ordinary conditions may be performed at the temperatures and concentrations present within a cell.The general concept of a chemical reaction has been extended to non-chemical reactions between entities smaller than atoms, including nuclear reactions, radioactive decays, and reactions between elementary particles as described by quantum field theory.".
- Chemical_reaction thumbnail ThermiteReaction.jpg?width=300.
- Chemical_reaction wikiPageExternalLink books?id=AJ-c8py7t6gC&pg=PA459.
- Chemical_reaction wikiPageExternalLink books?id=Mtth5g59dEIC&pg=PA287.
- Chemical_reaction wikiPageID "6271".
- Chemical_reaction wikiPageRevisionID "605620329".
- Chemical_reaction align "right".
- Chemical_reaction caption "Mechanism of a Diels-Alder reaction".
- Chemical_reaction caption "Orbital overlap in a Diels-Alder reaction".
- Chemical_reaction caption "SN1 mechanism".
- Chemical_reaction caption "SN2 mechanism".
- Chemical_reaction caption "SN2 reaction causes stereo inversion".
- Chemical_reaction caption "The three steps of an SN2 reaction. The nucleophile is green and the leaving group is red".
- Chemical_reaction direction "vertical".
- Chemical_reaction expiry "2014-10-10".
- Chemical_reaction hasPhotoCollection Chemical_reaction.
- Chemical_reaction image "Diels Alder Mechanismus.svg".
- Chemical_reaction image "Diels Alder Orbitale.svg".
- Chemical_reaction image "SN1 reaction mechanism.png".
- Chemical_reaction image "SN2 reaction mechanism.png".
- Chemical_reaction image "SN2-Walden-before-and-after-horizontal-3D-balls.png".
- Chemical_reaction image "Walden-inversion-3D-balls.png".
- Chemical_reaction small "yes".
- Chemical_reaction width "120".
- Chemical_reaction width "220".
- Chemical_reaction width "300".
- Chemical_reaction subject Category:Chemical_reactions.
- Chemical_reaction subject Category:Chemistry.
- Chemical_reaction comment "A chemical reaction is a process that leads to the transformation of one set of chemical substances to another. Classically, chemical reactions encompass changes that only involve the positions of electrons in the forming and breaking of chemical bonds between atoms, with no change to the nuclei (no change to the elements present), and can often be described by a chemical equation.".
- Chemical_reaction label "Chemical reaction".
- Chemical_reaction label "Chemische Reaktion".
- Chemical_reaction label "Chemische reactie".
- Chemical_reaction label "Reacción química".
- Chemical_reaction label "Reakcja chemiczna".
- Chemical_reaction label "Reazione chimica".
- Chemical_reaction label "Reação química".
- Chemical_reaction label "Réaction chimique".
- Chemical_reaction label "Химическая реакция".
- Chemical_reaction label "تفاعل كيميائي".
- Chemical_reaction label "化学反应".
- Chemical_reaction label "化学反応".
- Chemical_reaction sameAs Chemická_reakce.
- Chemical_reaction sameAs Chemische_Reaktion.
- Chemical_reaction sameAs Χημική_αντίδραση.
- Chemical_reaction sameAs Reacción_química.
- Chemical_reaction sameAs Erreakzio_kimiko.
- Chemical_reaction sameAs Réaction_chimique.
- Chemical_reaction sameAs Reaksi_kimia.
- Chemical_reaction sameAs Reazione_chimica.
- Chemical_reaction sameAs 化学反応.
- Chemical_reaction sameAs 화학_반응.
- Chemical_reaction sameAs Chemische_reactie.
- Chemical_reaction sameAs Reakcja_chemiczna.
- Chemical_reaction sameAs Reação_química.
- Chemical_reaction sameAs m.01vx5.
- Chemical_reaction sameAs Q36534.
- Chemical_reaction sameAs Q36534.
- Chemical_reaction wasDerivedFrom Chemical_reaction?oldid=605620329.
- Chemical_reaction depiction ThermiteReaction.jpg.
- Chemical_reaction isPrimaryTopicOf Chemical_reaction.