• Collision theory is a set of principles that states that the reacting particles can form products when they collide with one another provided those collisions have enough kinetic energy and the correct orientation.
  • Particles that lack the necessary kinetic energy may collide, but the particles will simply bounce off one another unchanged.
  • The figure below illustrates the difference.
  • In the first collision, the particles bounce off one another and no rearrangement of atoms has occurred.
  • The second collision
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