This is a reduction reaction as the oxide(oxygen) is taken away from the metal =]
Kinetic energy is from speed, motion, and mass while potential energy is stored energy
CIO4-=-1
CI=4O=-1
O has a 2- oxidation change so
CI+4(-2)=-1
CI+(-8)=-1
CI=-1+8=7
So the oxidation number of chlorine is 7 in this case
