Which of the following particles, is unstable?
1. Proton
2. Neutron
3. Electron
4. Antineutrino
Subtopic:  Nucleus |
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NEET 2026 - Target Batch - Vital (For Freshers)
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The nuclear radius of which of the following nuclei is approximately twice that of deuterium \((_1\mathrm{H}^2)\)?
1. \(_2\mathrm{He}^4\) 2. \(_3\mathrm{Li}^8\)
3. \(_4\mathrm{Be}^8\) 4. \(_8\mathrm{O}^{16}\)
Subtopic:  Nucleus |
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Given below are two statements: 
Assertion (A): The size of nuclei of various elements can be measured more accurately by performing Rutherford-type scattering experiments in which fast electrons, instead of \(\alpha-\)particles, bombard the target element.
Reason (R): Higher energy \(\alpha-\)particles begin to get affected by the nuclear forces as they approach closer to the nucleus.
  
1. Both (A) and (R) are True and (R) is the correct explanation of (A).
2. Both (A) and (R) are True but (R) is not the correct explanation of (A).
3. (A) is True but (R) is False.
4. Both (A) and (R) are False.
Subtopic:  Nucleus |
 57%
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If a nucleus is divided in the ratio of \(1:2^{1/3},\) what is the ratio of the velocities of the resulting parts?
1. \(2\)
2. \(2^{1/3}\)
3. \(2^{2/3}\) 
4. \(2^{(-1/3)}\)
Subtopic:  Nucleus |
 59%
From NCERT
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