QQuestion
Give two differences between nuclear fission and nuclear fusion.
✓Answer
| Nuclear fission | Nuclear fusion | |
|---|---|---|
| (a) | Nuclear fission is the process of breaking a heavy nucleus into two nearly equal fragments with the release of energy. | Nuclear fusion is the process of combining light nuclei to form a larger nucleus at a very high temperature and pressure with the release of energy. |
| (b) | This reaction is possible at ordinary temperature and ordinary pressure. | This reaction is possible only at a very high temperature (approximately 107 K) and a very high pressure. |
Related Questions
More ICSE Easy level questions
A lithium atom has 3 electrons, 3 protons and 4 neutrons. Its mass number is: (a) 3 (b) 4 (c) 7 (d) 10
(a) When does the nucleus of an atom tend to become radioactive? (b) Name a single pulley in which displacement of load and effort is not the same. (c) State one advantage of this pulley.
(a) In the following atoms, which one is a radioisotope? Give one use of it. O-16, C-14, N-14, He-4 (b) Name the class of the lever shown in the picture below:
How is the radioactivity of a radio isotope affected if it undergoes a chemical change? Give a reason for your answer.
Copy and complete the nuclear reaction by filling in the blanks.
(a) Which nuclear radiation will travel undeviated in an electric field? (b) How can one stop the radiations escaping from a nuclear reactor in a nuclear power plant? (c) Name one internal source of background radiations.
A radioactive element is kept in an evacuated chamber. The rate of radioactive emission will: (a) decrease (b) increase (c) remain unchanged (d) depend on the temperature
(a) Complete the following nuclear changes: (b) Name the nuclear radiation which has the highest ionizing power.
Which of the following radiations suffer maximum deflection in a magnetic field? (a) Alpha radiations (b) Beta radiations (c) Gamma radiations (d) X-radiations
Study the reaction given below and answer the questions that follow: (a) Name the process depicted in the reaction. (b) What is the value of X represented by the mass number of the intermediate uranium nucleus? (c) Identify Y, the missing product of the reaction.
Curium is a radioactive element with the symbol named in honour of Madam Curie. The graph of number of protons vs number of neutrons for some elements is shown below: (a) Which point on the graph indicates the element Cm? (b) Which point on the graph indicates daughter nucleus after Cm undergoes radioactive decay of 1α followed by 2β? (c) State the mass number of the daughter nucleus.
Complete the following by choosing the correct answers from the bracket: (a) In uniform circular motion the centrifugal force acts ............... [towards the centre/away from the centre/along the tangential direction]. (b) Refractive index of a medium is independent of ............... [temperature/angle of incidence/wavelength of light]. (c) Heat absorbed during change of phase depends on ............... [mass/change in temperature/specific heat capacity] of the substance. (d) Emf of a cell is ............... [greater than/less than/equal to] the terminal voltage when the cell is in open circuit. (e) In a step-up transformer the turns ratio is ............... [more than 1/less than 1/equal to 1]. (f) The nuclear radiation with lowest ionising power is ............... [α/β/γ].