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.
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. In a synthesis reaction, two or more simple substances combine to form a more complex substance. These reactions are in the general form: Two or more reactants yielding one product is another way to identify a synthesis reaction. Share. Reaction Definition: A reaction or chemical reaction is a chemical change which forms new substances. Reaction Examples: The chemical reaction H 2 (g) + ½ O 2 (g) → H 2 O(l) describes the formation of water from its elements. Also Known As: Chemical Reaction, Chemical Change. By Anne Marie Helmenstine, Ph.D Chemical reaction. Definition. noun, plural: chemical reactions. A process in which one or more substances (reactants) are chemically changed into one or more new substances (products). Chemical changes may involve motion of electrons in the forming and breaking of chemical bonds. Supplement. exothermic reaction-a chemical reaction accompanied by the evolution of heat. hydrolysis-a chemical reaction in which water reacts with a compound to produce other compounds; involves the splitting of a bond and the addition of the hydrogen cation and the hydroxide anion from the water. addition reaction-a chemical reaction in which one molecule is added to another. aldol reaction-a reaction of aldehydes resulting in an aldol. chain reaction-a series of chemical reactions in which the product of one is a reactant in the next. chemical reaction - (chemistry) a process in which one or more substances are changed into others; there was a chemical reaction of the lime with the ground water. addition reaction-a chemical reaction in which one molecule is added to another. aldol reaction-a reaction of aldehydes resulting in an aldol. chain reaction-a series of chemical reactions in which the product of one is a reactant in the next. By Anne Marie Helmenstine, Ph.D. Definition: A chemical reaction is a chemical change which forms new substances. Also Known As: reaction, chemical change. Examples: The chemical reaction H 2 (g) + ½ O 2 (g) → H 2 O(l) describes the formation of water from its elements.  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. In a synthesis reaction, two or more simple substances combine to form a more complex substance. These reactions are in the general form: Two or more reactants yielding one product is another way to identify a synthesis reaction. In biochemistry, a consecutive series of chemical reactions (where the product of one reaction is the reactant of the next reaction) form metabolic pathways. These reactions are often catalyzed by protein enzymes. In a synthesis reaction, two or more simple substances combine to form a more complex substance. These reactions are in the general form: Two or more reactants yielding one product is another way to identify a synthesis reaction.
https://en.wikipedia.org/wiki/Chemical_reaction http://chemistry.about.com/od/chemistryglossary/a/reactiondef.htm http://www.biology-online.org/dictionary/Chemical_reaction http://www.thefreedictionary.com/chemical+reaction http://www.thefreedictionary.com/chemical+reaction http://chemistry.about.com/od/engineeringglossary/g/chemical-reaction-definition.htm https://en.wikipedia.org/wiki/Chemical_reaction https://en.wikipedia.org/wiki/Chemical_reaction
what is a chemical reaction definition