NCERT solution Class 12 nuclei

NCERT Solutions

Class 12 Physics

Nuclei

NCERT Questions

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Q.14
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Q.14

The nucleus ²³₁₀Ne decays by β^–emission. Write down the β-decay equation and determine the maximum kinetic energy of the electrons emitted.

Given that: m (²³₁₀Ne) = 22.994466 um (²³₁₁Na) = 22.089770 u.

In β^- emission, the number of protons increases by 1, and one electron and an antineutrino are emitted from the parent nucleus.

β^- Emission of the nucleus (²³₁₀Ne)

(²³₁₀Ne) à (²³₁₁Na) + e^- + ̅ν + Q

It is given that:

Atomic mass m (²³₁₀Ne) of = 22.994466 u

Atomic mass m (²³₁₁Na) of = 22.989770 u

Mass of an electron, m_e = 0.000548 u

Q-value of the given reaction is given as:

Q= [m (²³₁₀Ne) + [m (²³₁₁Na) +m_e]] c²

There are 10 electrons in and 11 electrons in (²³₁₁Na). Hence, the mass of the electron is cancelled in the Q-value equation.

Therefore Q = [22.994466 - 22.989770] c²

= (0.004696 c²) u.

But 1u = 9.31

Therefore Q= (0.004696 x 931.5) =4.374MeV.

The daughter nucleus is too heavy as compared to e^-and ̅ν. Hence, it carries negligible energy. The kinetic energy of the antineutrino is nearly zero. Hence, the maximum kinetic energy of the emitted electrons is almost equal to the Q-value, i.e., 4.374 MeV.

Nuclei Class 12 Physics NCERT Chapter 13 NCERT Solutions

Solving NCERT textbook questions of Nuclei Class 12 Physics NCERT Chapter 13 is a crucial step to gauge your understanding of the concepts. It provides you with an opportunity to assess your grasp of the material after learning each chapter. We have already provided solutions to all the exercises in the NCERT textbook of Class 12 Physics Nuclei, available in various formats such as video, text, and downloadable PDFs. If you need assistance with any of the NCERT questions or any other academic topics, feel free to ask in the “Ask Questions” section of LearnoHub.com.

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Using the NCERT solutions module effectively can significantly enhance your learning experience and understanding of the subject matter. Here's a step-by-step guide on how to make the most out of the NCERT solutions:

Attempt to Solve Yourself: Before looking at the solution, try to solve or answer the question independently. This practice will help you test your knowledge and problem-solving skills.
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Refer to Solution Video (if needed): If you encounter difficulty or are unable to solve a question, you can refer to the NCERT solution video on Nuclei Class 12 Physics NCERT Chapter 13 to get a step-by-step explanation of the correct approach. Pay attention to the reasoning and methodology used in the video.
Solve Again Yourself: Once you've understood the solution, attempt to solve the question again by yourself. Repetition and practice solidify your understanding of the concepts and improve retention.
Avoid Memorization: Focus on understanding the underlying principles and concepts behind each solution. Avoid simply memorizing the solutions, as this may hinder your ability to apply the knowledge in different contexts.
Attempt All Questions: Make an effort to attempt all the questions provided in the NCERT textbook. This comprehensive practice will help you cover the entire syllabus and reinforce your understanding across various topics. You may refer Class 12 Physics Nuclei Online Test on LearnoHub.com.
Review and Revise: Regularly review the concepts and solutions you've learned. Revise your notes and practice regularly to retain the knowledge effectively. You may refer Nuclei Class 12 Physics Notes.
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NCERT solutions of Nuclei Class 12 Physics - all questions of all exercises are solved. Q. No. 1, 2, 3, and so on. Complete explanation and detailed solution makes them the best videos for Class 12 Physics Nuclei NCERT solutions.