1. chain reaction the splitting of a nucleus into two smaller nuclei whose combined mass is less than that of the original nucleus 2. critical mass a self-sustaining reaction that creates an on-going series of reactions 3. fission the amount of fissionable material required to keep a reaction going 4. fusion the joining of two small nuclei to form one nucleus with a larger mass than the combined mass of the original nuclei

Respuesta :

Nuclear fission is a chain reaction the splitting of a nucleus into two smaller nuclei whose combined mass is less than that of the original nucleus

critical mass a self-sustaining reaction that creates an on-going series of reactions is a Chain reaction

In a fusion reaction, two light nuclei combine to create one heavy nucleus. Because the mass of the resulting single nucleus is smaller than the combined mass of the two initial nuclei, the process releases energy. Energy is created from the remaining mass.

The Sun and other stars are powered by nuclear fusion reactions. A heavier nucleus is created when two light nuclei fuse together in a fusion reaction. Because the mass of the resulting single nucleus is smaller than the combined mass of the two initial nuclei, the process produces energy. Remaining mass is converted to energy. Why this happens is explained by Einstein's equation (E=mc2), which states in part that mass and energy can be transformed into one another. Fusion energy could be a significant source of energy generation if scientists can figure out how to use it in equipment on Earth.

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