NCERT solutions for class 12 Physics chapter 13 Nuclei: Do you know that the size of an atom is 10000 times the size of a nucleus? But the nucleus contains 99.9% of the mass of an atom. We know that an atom has a structure. Does the nucleus also have a structure? If so what are the constituents and how they are arranged? All these questions are answered in solutions of NCERT class 12 physics chapter 13 nuclei. This chapter comes under modern physics and you can expect at least one question for board exam from CBSE NCERT solutions for class 12 physics chapter 13 nuclei. Learning the solutions of NCERT is important to score well in the board exam. Certain important formulas required for NCERT solutions for class 12 physics chapter 13 nuclei are listed below.
Radii of the nuclei,
Where A is the mass number and
Here Z is the atomic number, M is the mass of the nucleus and A is the mass number. This equation tells that the mass of the nucleus is always less than the mass of their constituents.
Another important relation which helps in CBSE NCERT solutions for class 12 physics chapter 13 nuclei is Einstein's mass-energy relation.
Where c is the speed of light.
Another main concept of NCERT grade 12 chapter 13 nuclei is the law of radioactive decay. This is given by
Where N is the number of nuclei at any time t, is the number of nuclei at any time and lambda is disintegration constant.
The half-life of a radionuclide is given by
Where lambda is the disintegration constant.
After completing all these topics try to do NCERT class 12 chapter 13 exercises. If you are unable to solve or have any doubts refer to the solutions of NCERT class 12 physics chapter 13 nuclei provided below.
NCERT solutions for class 12 physics chapter 13 Nuclei