The medical dictionary on eMedicineHealth is organized with a list of medical terms under each letter. By clicking on a letter, you will jump to the list of words. There, you can browse down the terms to find the word you are looking for.
When a catalyst is involved in the collision between the reactant molecules, less energy is required for the chemical change to take place, and hence more collisions have sufficient energy for reaction to occur. The reaction rate therefore increases.Collision theory is closely related to chemical kinetics.hen a catalyst is involved in the collision between the reactant molecules, less energy is required for the chemical change to take place, and hence more collisions have sufficient energy for reaction to occur. The reaction rate therefore increases. Collision theory is closely related to chemical kinetics.
For these reactions to take place, the following elements are necessary: 1  Precursor compounds: these compounds are the starting molecules or substrates in a reaction. 2  These may also be viewed as the reactants in a given chemical process. 3  Chemical energy: chemical energy can be found in the form of high energy molecules.