# NCERT Solutions For Class 12 Physics Chapter 12 Atoms PDF Download

Download here NCERT Solutions For Class 12 Physics Chapter 12 Atoms in PDF format. Get a detailed explanation of each question of Class 12 Atoms and fields, along with important questions. Class 12th Physics Part 2 Solution is hosted here with the complete details and explanation. NCERT12th Physics Solutions is based on the updated Class 12 Physics textbook.

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To properly solve the question of Chapter Atoms, it is highly advised that school students should refer to 12th Physics Atoms Notes. Physics Chapter 8 Numerical and derivation based questions are very important for CBSE Exams.

## NCERT Solutions For Class 12 Physics Chapter 12

There are 17 Most important questions in Chapter 12 are available. Students of class twelfth must solve all the question of Atoms. NCERT solution of Class 12th Physics Chapter 8 comprises of a detailed answer to all the important questions.

All the theorems and concepts based question of Chapter 12 – Electromagnetic Waves are explained with the help of examples for CBSE Board exams.

### Class 12 physics NCERT Solutions Atoms Important Questions

Question 12.1:
Choose the correct alternative from the clues given at the end of the each statement:
(a) The size of the atom in Thomsonâ€™s model is â€¦â€¦â€¦. the atomic size in Rutherfordâ€™s model. (much greater than/no different from/much less than.)
(b) In the ground state of â€¦â€¦â€¦. electrons are in stable equilibrium, while in â€¦â€¦â€¦. electrons always experience a net force. (Thomsonâ€™s model/ Rutherfordâ€™s model.)
(c) A classical atom based on â€¦â€¦â€¦. is doomed to collapse. (Thomsonâ€™s model/ Rutherfordâ€™s model.)
(d) An atom has a nearly continuous mass distribution in a â€¦â€¦â€¦. but has a highly nonuniform
mass distribution in â€¦â€¦â€¦. (Thomsonâ€™s model/ Rutherfordâ€™s model.)
(e) The positively charged part of the atom possesses most of the mass in â€¦â€¦â€¦. (Rutherfordâ€™s model/both the models.)
Answer
(a) The sizes of the atoms taken in Thomsonâ€™s model and Rutherfordâ€™s model have the same order of magnitude.
(b) In the ground state of Thomsonâ€™s model, the electrons are in stable equilibrium. However, in Rutherfordâ€™s model, the electrons always experience a net force.
(c) A classical atom based on Rutherfordâ€™s model is doomed to collapse.
(d) An atom has a nearly continuous mass distribution in Thomsonâ€™s model, but has a highly non-uniform mass distribution in Rutherfordâ€™s model.
(e) The positively charged part of the atom possesses most of the mass in both the models.

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