In one kind of nuclear reaction, two nuclei fuse, or join together, to form a larger nucleus. this kind of reaction happens only at very high pressures. explain why such high pressures are necessary to cause these reactions to occur.

High pressures are necessary to create such reaction so that the particles will be able to overcome electrostatic repulsion. The particles that make up a particular atom are covered by shells of energy that react to different impulses like pressure. When particles are exposed to extreme environmental pressure it has the tendency to split its particles and undergo nuclear fusion successfully.

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