CBSE 12th Standard Physics Subject Nuclei 3 Mark Ncert Exemplar Questions 2021
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CBSE 12th Standard Physics Subject Nuclei 3 Mark Ncert Exemplar Questions 2021
12th Standard CBSE
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Reg.No. :
Physics
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In a nucleus of 92U238 , find the number of protons and the number of neutrons.
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Obtian the approximate velue of the radius of a nucleus 92U238 , R0 is 1.2 x 10-15 m.
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The number of \(\alpha \)-particles scattered at an angle of 900 is 100 per minute. What will be the number of \(\alpha \)-particles, when it is scattered at an angle of 600?
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Two radioactive nuclei A and B, in a given sample disintegrates into a stable nucleus C. At time t = 0, number of A species are 4N0 and that of B are N0. Half-life of A (for conversion to C) is 1 min whereas, that of B is 2 min. Initially, there are no nuclei of C present in the sample. When number of nuclei of A and B are equal, then what would be the number of nuclei of C present in the sample?
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86R222 is converted into 84Po218. Name the particle emitted in this case and write down the corresponding equation.
(a)
