What is the difference between fission and fusion plz give me the 3 differences of these two

There are many differences between nuclear fission and fusion.
Nuclear Fission is :
-the splitting of a nucleus into smaller particles, releasing a high amount of energy
-Does not occur naturally
-produces many highly reactive particles
-energy released is million times greater that in chemical reactions but lower than the energy released by nuclear fusion

Nuclear fusion is:
-the combination of 2 smaller atoms to create a large atom releasing energy
-Occurs in stars such as the sun
-produces few radioactive particles, but requires fusion trigger
-energy released is 3 to 4 times greater than the energy released by fission

Kinetic energy = 1/2mv^2. since the mass is constant we can form a ratio of it's kinetic energy at 60 divided by that at 30 to see ke(60)/ke(30) = +(60^2)/30^2). this may be said to 300% increase.