NCERT Solutions for Class 12 Physics Chapter 12 Atoms provided here is extremely helpful in revising complete syllabus and getting a strong base on it. NCERT 12th Class Physics Atoms all questions are solved with detailed explanation available for students. In this article we had given of NCERT solutions for Atoms Class 12 Physics step by step solution for each and every question of the chapter. These solutions will also help you with your homework. Best teachers across the India created NCERT solutions for Class 12 Physics Chapter 12 Atoms according to curriculum and pattern of syllabus as per guidelines of NCERT (CBSE) Books.
12th Class NCERT Physics Chapter 12 Atoms
| Name of Organization | NCERT |
| Name of Class | 12th Class |
| Name of Subject | Physics |
| Name of Chapter | Chapter 12 |
| Name of Content | Atoms |
| Name of Category | NCERT Solutions |
| Official site | http://ncert.nic.in/ |
Chapter 12 Atoms covers numerous Questions and answers from all topics and sub-topics which are given below
| Section Name | Topic Name |
| 12 | Atoms |
| 12.1 | Introduction |
| 12.2 | Alpha-particle Scattering and Rutherford’s Nuclear Model of Atom |
| 12.3 | Atomic Spectra |
| 12.4 | Bohr Model of the Hydrogen Atom |
| 12.5 | The Line Spectra of the Hydrogen Atom |
| 12.6 | DE Broglie’s Explanation of Bohr’s Second Postulate of Quantisation |
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 Thomson’s model is ………. the atomic size in Rutherford’s model. (much greater than/no different from/much less than.)
(b) In the ground state of ………. electrons are in stable equilibrium, while in ………. electrons always experience a net force. (Thomson’s model/ Rutherford’s model.)
(c) A classical atom based on ………. is doomed to collapse. (Thomson’s model/ Rutherford’s model.)
(d) An atom has a nearly continuous mass distribution in a ………. but has a highly nonuniform
mass distribution in ………. (Thomson’s model/ Rutherford’s model.)
(e) The positively charged part of the atom possesses most of the mass in ………. (Rutherford’s model/both the models.)
Answer
(a) The sizes of the atoms taken in Thomson’s model and Rutherford’s model have the same order of magnitude.
(b) In the ground state of Thomson’s model, the electrons are in stable equilibrium. However, in Rutherford’s model, the electrons always experience a net force.
(c) A classical atom based on Rutherford’s model is doomed to collapse.
(d) An atom has a nearly continuous mass distribution in Thomson’s model, but has a highly non-uniform mass distribution in Rutherford’s model.
(e) The positively charged part of the atom possesses most of the mass in both the models.
