4.1 Chemical Equations

Chemical Equations

A chemical reaction is a process in which a substance/s undergo/es a change of chemical composition, which involves the breaking and/or forming of chemical bonds between atoms. A chemical reaction is represented by an arrow (→) between the chemical formulas for the reactants, or starting substances, and products, or ending substances. An example of a written chemical reaction would be ${2A + B → A_2B}$, where A and B are the reactants and ${A_2B}$ is the product. For a chemical reaction to take place, there must be a re-arrangement of atoms. Otherwise, the reaction is considered invalid.