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प्रश्न
Differentiate between nuclear fission and nuclear fusion.
उत्तर १
| Nuclear fission | Nuclear fusion | |
| Definition | Fission is the splitting of the heavy nucleus of a radioactive atom into smaller nuclei. | Fusion is the fusing of two or more lighter nuclei into a heavy nucleus. |
| Natural occurrence of the process | The process of nuclear fission does not normally occur in nature. | Fusion occurs in stars, such as the sun. |
| Energy released | The energy released by fission is a million times greater than that released in chemical reactions but is lower than the energy released by nuclear fusion. | The energy released by fusion is three to four times greater than the energy released by fission. |
उत्तर २
| Nuclear fission | Nuclear fusion | |
| 1. | When a heavy nucleus is agitated, it splits into two smaller nuclei with comparable masses. | Two lighter nuclei fuse together to create a heavier nucleus. |
| 2. | This phenomenon does not require high temperatures or pressures to occur. | This phenomenon requires tremendous pressure and temperature conditions to occur. |
| 3. | Neutrons are the link particles. | Protons are the link particles. |
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संबंधित प्रश्न
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(a) high calorific value
(b) no emission of smoke
(c) smooth burning
(d) high ignition temperature
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In the nuclear reactor of a power plant:
how do control rods control the rate of fission?
how is heat removed from the reactor core, and what use is made of this heat?
In a nuclear power plant, coolant is a substance:
(a) which cools the hot, spent steam to condense it back to water
(b) which transfers heat from reactor to water in heat exchanger
(c) which is boiled to make steam to turn the turbine
(d) which cools the generator coils to prevent their overheating.
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`""_1^2H+_1^2H->_2^3He+xc+E`
What does E represent?
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\[\ce{_Z^AX ->_Z^{A-1}Y + _-1^0e}\]
An element X has the symbol 84X202. It emits an alpha-particle and then a beta-particle. The final nucleus is bYa. Find a and b.
Give scientific reasons.
It is absolutely necessary to control the fission reaction in nuclear power plants.
