Physics Class 10 Chapter 9 Short Notes

Complete Notes on Chapter No.18:  physics class 10 chapter 9 short notes written by Mr. Adnan Haider. These computerized notes are very helpful in the preparation of physics class 10 chapter 9 short notes for students of the Physics and these are according to the paper patterns of all Punjab boards.

• Here are the detailed important question of physics class 10 chapter 9 to help you prepare for your exams.
• Atomic and Nuclear Physics Exercise Multiple Choice Questions ( MCQs ) with Correct Answers.
• Atomic and Nuclear Physics Exercise Short Questions with Answers.
• What is difference between Atomic Number and Atomic Mass number?
• What do you mean by the term radioactivity?
• How can we make radioactive elements artificially?
• What are the three basic radioactive decay processes and how do they differ from each other?
• Write two properties of beta rays.
• Explain whether the atomic number can increase during nuclear decay?
• Important class 10 physics chapter 9 exercise solutions for all students of Punjab  Textbook Board.
• What do you understand by half-life of a radioactive element?
• Is radioactivity a spontaneous process?
• What is meant by Background radiations?
• Describe two uses of radioisotopes in medicine, Industry or research? 
• Important 10th class physics chapter 9 mcqs for all students of Punjab  Textbook Board.
• What are two common radiation hazards? Briefly describe the precautions that are taken against them.
• What is meant by cosmic radiations.
• Nuclear fusion reaction is more reliable and sustainable source of energy than nuclear fission chain reaction?
• Define Isotopes.
• Important mcqs of physics class 10 chapter 9 for all students of Punjab  Textbook Board.
• Define nuclear transmutation.
• Define Ionization.
• Write two properties of gamma rays.
• Important mcqs test of physics class 10 chapter 9 for all students of Punjab  Textbook Board.
• Which has more penetrating power, an Alpha particle or a Gamma rayphoton.
• What is the difference between Natural and Artificial radioactivity?
• Define Fission reaction.
• Define nuclear fusion. Write its equation.
• Important physics mcqs for class 10 chapter 9 for all students of Punjab  Textbook Board.
• Define Carbon dating.
• Define Penetrating Power.
• What is meant by tracer?
• Write two properties of 𝑎-Particle.
• Important class 10 physics chapter 9 mcqs with answers for all students of Punjab  Textbook Board.
• Define radioactive isotopes.
• Difference between stable and unstable nuclei?
• Write half-life of Hydrogen, Lead, Uranium, and Carbon.
• Define atom and write its basic particles.
• Define Electron Volt.
• Important 10th class physics chapter 9 important questions for all students of Punjab  Textbook Board.
• RADIOISOTOPES AND THEIR USES: Nuclei which do not emit radiations naturally are called stable nuclei. In general, most of the nuclei with atomic number 1 to 82 are stable nuclei. While the elements whose atomic number is greater than 82 are naturally unstable. They emit different types of radiations, all the time, and hence continuously change from one type of element to another. 
• Important 10th class physics chapter 9 exercise for all students of Punjab  Textbook Board.
• The stable and non-radioactive elements can also be changed into radioactive elements by bombarding them with protons, neutrons or alpha particles. Such artificially produced radioactive elements are called radioactive isotopes or radioisotopes. Here are some examples of the production of radioisotopes:
• Important physics class 10 chapter 9 full explanation for all students of Punjab  Textbook Board.
• Uses of Radioisotopes: Radioisotopes are frequently used in medicine, industry and agriculture for variety of useful purposes. Following are few applications of radioisotopes in different fields.
• Tracers: Radioactive tracers are chemical compounds containing some quantity of radioisotope. They can be used to explore the metabolism of chemical reactions inside the human body, animals or plants. Radioisotopes are used as tracers in medicine, industry and agriculture. For example, radio iodine131 readily accumulates in the thyroid gland and can be used for the monitoring of thyroid functioning. For the diagnosis of brain tumor phosphorous-32 is used.
• Important class 10 physics chapter 9 important questions for all students of Punjab  Textbook Board.
• Medical Treatment: Radioisotopes are also used in nuclear medicines for curing various diseases. For example, radioactive cobalt-60 is used for curing cancerous tumors and cells. The radiations kill the cells of the malignant tumor in the patient.
• Carbon Dating: Radioactive carbon-14 is present in small amount in the atmosphere. Live plants use carbon dioxide and therefore become slightly radioactive When a tree dies, the radio carbon-14 present inside the plant starts decaying. Since the half-life of carbon-14 is 5730 years, the age of a dead tree can be calculated by comparing the activity of carbon-14 in the live and dead tree. The activity of the live tree remains almost constant as the carbon-14 is being replenished while the carbon-14 in the dead tree is no more replenished. 
• Important class 10th physics chapter 9 important notes for all students of Punjab  Textbook Board.