It can be represented on an energy level diagram. The diagram shows that when a catalyst is used, the activation energy is reduced. This makes more of the collisions successful at a given temperature.
A comparison of the relative covalent radii of atoms is shown in the diagram below ... atoms have more electrons in their outer energy level and more protons in their nucleus.
Some results have been hidden because they may be inaccessible to you
Show inaccessible results