NCERT solution Class 12 nuclei

NCERT Solutions

Class 12 Physics

Nuclei

NCERT Questions

Q.1
Q.2
Q.3
Q.4
Q.5
Q.6
Q.7
Q.8
Q.9
Q.10
Q.11
Q.12
Q.13
Q.14
Q.15
Q.16
Q.17
Q.18
Q.19
Q.20
Q.21
Q.22

Q.1

(a) Two stable isotopes of lithium (⁶₃Li) and (⁷₃Li) have respective abundances of 7.5% and 92.5%. These isotopes have masses 6.01512 u and 7.01600 u, respectively. Find the atomic mass of lithium.

(b) Boron has two stable isotopes, (¹⁰₅B) and (¹¹₅B). Their respective masses are 10.01294 u and 11.00931 u, and the atomic mass of boron is 10.811 u. Find the abundances of ¹⁰₅B and ¹¹₅B.

Given:

Mass of (⁶₃Li) lithium isotope, m₁ = 6.01512 u

Mass of (⁷₃Li) lithium isotope, m₂ = 7.01600 u

Abundance of (⁶₃Li), η₁ =7.5%

Abundance of (⁷₃Li), η₂= 92.5%

The atomic mass of lithium atom is given as:

m =

=6.940934 u

(b) Mass of boron isotope (¹⁰₅B), m₁ = 10.01294 u

Mass of boron isotope (¹¹₅B), m₂ = 11.00931 u

Abundance of (¹⁰₅B), η₁ = x%

Abundance of (¹¹₅B), η₂= (100 − x) %

Atomic mass of boron, m = 10.811 u.

The atomic mass of boron atom is given as:

m =

10.811 =

108.11 = (10.01294x + 1100.931 – 11.00931x)

Therefore, x = 19.8210.99637

=19.89%

And 100 − x = 80.11%

Hence, the abundance of (¹⁰₅B) is 19.89% and that of (¹¹₅B) is 80.11%.

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.
Match with Our Solution: After attempting the question, compare your result and approach with the provided NCERT solution. This step allows you to identify any mistakes or gaps in your understanding.
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.