it is a process that is usually characterized by a chemical change in which the starting materials (reactants) are different from the products.
1 A physical change, such as a state change or dissolving, does not create a new substance, but a chemical change does. 2  In a chemical reaction, the atoms and molecules that interact with each other are called reactants. 3  In a chemical reaction, the atoms and molecules produced by the reaction are called products. Explain that in most chemical reactions, two or more substances, called reactants, interact to create different substances called products. Tell students that burning a candle is an example of a chemical reaction. 1 In a chemical reaction, the atoms and molecules produced by the reaction are called products. 2  In a chemical reaction, only the atoms present in the reactants can end up in the products. 3  No new atoms are created, and no atoms are destroyed. Explain that in most chemical reactions, two or more substances, called reactants, interact to create different substances called products. Tell students that burning a candle is an example of a chemical reaction. Chemical reactions occur whenever bonds are formed or broken between molecules. Why certain atoms combine with which other atoms is a complex question which is explained exhaustively by quantum chemistry. The simple version is that atoms bond together electromagnetically based on the properties of their electron shells. Scientists combine substances to cause chemical reactions. Oxygen combines with iron in a chemical reaction to form iron oxide, which is more commonly known as rust. Chemists may perform Chemical reactions happen at a characteristic reaction rate at a given temperature and chemical concentration. Typically, reaction rates increase with increasing temperature because there is more thermal energy available to reach the activation energy necessary for breaking bonds between atoms. Chemical equations are used to graphically illustrate chemical reactions. They consist of chemical or structural formulas of the reactants on the left and those of the products on the right. They are separated by an arrow (→) which indicates the direction and type of the reaction; the arrow is read as the word yields. A chemical reaction is a process that is usually characterized by a chemical change in which the starting materials (reactants) are different from the products. Chemical reactions tend to involve the motion of electrons, leading to the formation and breaking of chemical bonds.  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. Chemical equations are used to graphically illustrate chemical reactions. They consist of chemical or structural formulas of the reactants on the left and those of the products on the right. They are separated by an arrow (→) which indicates the direction and type of the reaction; the arrow is read as the word yields. A chemical reaction is a process in which the identity of at least one substance changes. A chemical equation represents the total chemical change that occurs in a chemical reaction using symbols and chemical formulas for the substances involved.  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. Chemical equations are used to graphically illustrate chemical reactions. They consist of chemical or structural formulas of the reactants on the left and those of the products on the right. They are separated by an arrow (→) which indicates the direction and type of the reaction; the arrow is read as the word yields. 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 equations are used to graphically illustrate chemical reactions. They consist of chemical or structural formulas of the reactants on the left and those of the products on the right. They are separated by an arrow (→) which indicates the direction and type of the reaction; the arrow is read as the word yields. Expert on ancient and European history. A chemical reaction occurs when one or more chemicals react to become different chemicals. A chemical reaction is characterized by the re-arrangement of atoms from the reactant side of the equation to the product side. It's a bit like square dancing because at any given time you may have a different partner than when you started but no matter how you re-arrange the dancers, you always have the same people. A chemical reaction is a change in which one kind of matter changes into a different kind of matter with different properties. Reactant is a substance used in a chemical react … ion and a product is a substance made in a chemical reaction. Hope this is helpful! ;).
http://www.middleschoolchemistry.com/lessonplans/chapter6/lesson1 http://www.middleschoolchemistry.com/lessonplans/chapter6/lesson1 http://www.wisegeek.org/what-are-chemical-reactions.htm https://en.wikipedia.org/wiki/Chemical_reaction http://chemistry.about.com/od/chemicalreactions/a/reactiontypes.htm https://en.wikipedia.org/wiki/Chemical_reaction https://www.shodor.org/UNChem/basic/chemreac/index.html https://en.wikipedia.org/wiki/Chemical_reaction https://en.wikipedia.org/wiki/Chemical_reaction http://www.answers.com/Q/What_is_a_chemical_reaction
what is chemical reaction