Are the molecularity and reaction order different for elementary reactions

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Are the molecularity and reaction order different for elementary reactions?

   It may be stated once again that the total number of molecules or atoms which participate in a reaction as represented by the chemical equations is known as the molecularity of the reaction. The sum of the power to which the concentrations are raised in the rate law is termed as the order of a reaction. Let us consider an elementary reaction of the type.
       2A + B --> Products.
  
      Since the rate of a reaction is proportional to number of collisions between the atoms or molecules of the reactants, and the number of collisions is proportional to the concentration of each reactant species, the rate of the above reaction                alfa [A²] [B²].
         rate = k [A²] [B] 
Molecularity of reaction =      2 + 1 = 3

   It shows that the molecularity and order of an elementary reaction are the same.




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