Nuclei Class 12 Physics chapter 13 Notes
Class 12 Notes Chapter 13 Revision Notes
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Nucleic Class 12 Physics Chapter 13 Notes
The NCERT Results for Class 12 Physics are matter experts according to the latest CBSE Syllabus 2023-24 and Nucleus is the topic of NCERT Grade 12 Physics Chapter 13. Students will learn about atomic mass and nuclear composition, nuclear size, mass, and binding energy, nuclear force, radioactivity, and nuclear energy in this chapter. It contains the solutions to all of the text's questions.
NCERT notes are an excellent way to study for the exam. It will also assist pupils in understanding the types of questions that would be asked in competitive exams. Scroll down to learn more about CBSE Grade 12 Physics Chapter 13 Formulas and Solutions
Read or Download - Class 12 physics Chapter 13 Nuclei Pdf Notes
In each atom, the positive charge and mass are in the center of the rotation, and the mass of the cell is rotated. Frequently concentrated in the intestine, and in the intestine. More than 99.9% of the atomic mass is concentrated in the nucleus.
2. Atomic mass unit (amu) is a unit of nuclear mass expressed as a nuclear mass
Unit. The atomic mass unit is defined as 1 / 12th of the mass of the carbon atom (C12).
Composition of the nucleus The composition of a nucleus can be described using the following terms and symbols.
(i) Atomic Number Z The atomic number of an element is the number of protons present inside the atomic nucleus of the element.
Atomic number = number of protons = number of electrons
(ii) Mass Number The mass number of an element is the number of total protons and neutrons inside the atomic nucleus of the element.
Mass number = number of protons + number of neutrons = number of electrons + number of neutrons i.e. A = Z + N
৪. If the size of the nucleus is the radius of the nucleus, then its mass is A
The atomic density of a nuclear substance is the ratio of the mass of the nucleus to its mass.
Radio. Radioactivity is the occurrence of spontaneous partitioning of the nucleus of an atom with the emission of one or more radiations such as one-particle, part-particle or 3 rays.
Radio. Radioactive decay It is a nuclear conversion process in which radioactive rays are emitted from the nucleus of the phase. This process cannot be accelerated and slowed down by any physical or chemical process.
৮. The radioactive decay law According to this law, the rate of loss of any radioactive atom is proportional to the number of atoms in that instant.
The half-life of a radioactive element is defined as the time at which half the number of atoms present in the element is present in the elemental decay sample.
Average Life / Average Life The average life of a radioactive element is obtained by calculating the total life time of all atoms of the radioactive element and dividing it by the number of atoms present in the sample of the element of element.
Need time to decay from N0 to N
12. The decay constant radioactive decay constant can be defined as the interaction between the time at which the number of atoms in the radioactive substance decreases by 8.8% to their initial number.
13. The radioactive displacement law The radioactive displacement law is also known as the law of Fazan and Sodi. This law describes what chemical elements and isotopes are produced during certain types of radioactive decay.
(i) decay At decay, the mass of the product nucleus is four less than that of the nucleating nucleus and the atomic number is reduced by two.
(ii) Dec-decay In deck-dec, the mass of the product nucleus remains the same but the atomic number increases or decreases one.
In beta-minus decay (β–), an electron and an anti nutrin are formed and emitted from the nucleus by the following reaction:
At beta-plus decay (β +), a positron and neutrino are created and emitted from the nucleus by the following reaction:
(iii) The ray is emitted at or- decay when any or all of the daughter nucleus is excited as a result of decay. The atom then returns to the ground state by a single photon transition involving one or more photons.
14. SI unit of radioactivity Beckerel (Beck).
1 Beckerel (Beck) = 1 split / second other unit
(i) Curie The activity of a radioactive sample is considered to be a curie.
1 Curie (CI) = 3.7 x 1010 dess / sec
(ii) Rutherford The activity of a radioactive sample is called as Rutherford.
1 Rutherford (RD) = 106 decays / second
Importance of Class 12 Physics Revision Notes
Class 12 physics Chapter 13 Nuclei is an important study material for the Students who are presently studying in CBSE 12th standard. The NCERT Results for Class XIIth physics are important as they will help you to Understand the content completely.
The nucleus is the centrally placed entity of an atom that was discovered by renowned scientist Ernest Rutherford. The nucleus is made up of neutrons and protons, and its function is important in radioactive reactive reactions such as nuclear fission and nuclear fusion. You can learn about the nucleus in plant cells, how things work in the nucleus without the nuclear membrane, and the meaning of the nucleus in biology by studying other relevant topics.
The PW PhysicsWallah offers free PDF downloads of Class 12 Physics Chapter 13 Nuclei Notes. These latest chapter-wise notes are ideal for quick preparation of CBSE board exams and school-based annual examinations. Additionally, CBSE Guide website provides comprehensive notes covering the latest syllabus of CBSE and NCERT, including all topics given in NCERT class 12 Physics textbook. Users can download CBSE guide quick revision notes from both platforms to score high in exams.
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