Question 11 The most used 'nuclear fuel' for nuclear fission is Uranium-235. a) Explain what happens to a Uranium-235 nucleus when it undergoes nuclear fission. [Suggested word count 70] b) Write an equation and explain Uranium-235 nucleus chain reaction and critical mass. (About 80 words) [4.2]
Nuclear Fusion
Nuclear fusion is a type of nuclear reaction. In nuclear fusion, two or more than two lighter atomic nuclei combine to form a heavier nucleus. During this process, an enormous amount of energy is released. This energy is called nuclear energy. Nuclear fusion is the energy source of the sun and stars.
Fusion Bomb
A fusion bomb is also known as a thermonuclear bomb or hydrogen bomb which releases a large amount of explosive energy during a nuclear chain reaction when the lighter nuclei in it, combine to form heavier nuclei, and a large amount of radiation is released. It is an uncontrolled, self-sustaining nuclear chain reaction where isotopes of hydrogen combine under very high temperature to form helium. They work on the principle of operation of atomic fusion. The isotopes of Hydrogen are deuterium and tritium, where they combine their masses and have greater mass than the product nuclei, get heated at high temperatures, and releases energy.
![Question 11
The most used 'nuclear fuel" for nuclear fission is Uranium-235.
a) Explain what happens to a Uranium-235 nucleus when it undergoes nuclear fission. [Suggested word count 70]
b) Write an equation and explain
chain reaction and critical mass. (About 80 words)
[4.2]
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