Фізика 11. Урок-презентація «Протонно-нейтронна модель атомного ядра. Ядерні сили. Енергія зв’язку»

Physics 11th grade. Presentation for lesson 79 on the topic "Proton-neutron model of the atomic nucleus. Nuclear forces. Binding energy of atomic nuclei". Distance learning: Physics -   / physics.ukr   Purpose of the lesson: Educational. To introduce students to the model of the atomic nucleus and the history of the discovery of the proton and neutron; to introduce students to a new type of interaction between the particles that make up the atomic nucleus. Developmental. To develop students' cognitive skills; the ability to analyze educational material, the condition of the problem, the course of solving problems; the ability to concisely and competently express their reasoning and justify their correctness. Educational. To cultivate attentiveness, concentration, observation. Online lesson for distance learning from the "Physics Online" project. Based on the book "Physics 11" edited by V. G. Bar'yakhtar, S. O. Dovhy. Some materials for this video are taken from the FIZIKA NOVA website https://www.fizikanova.com.ua/ If you liked it, don't forget to like, subscribe and share the video with those who might also be interested in it. 00:00 Lesson "Proton-neutron model of the atomic nucleus. Nuclear forces. Binding energy of atomic nuclei" 01:04 What particles does the atomic nucleus consist of? 01:40 Nucleon (mass) number (A), charge (proton) number (Z), number of neutrons (N=A – Z). 03:20 A nuclide is a type of atom characterized by a certain value of the charge number and a certain value of the mass number. 04:01 What nuclides are called isotopes? 05:42 Nuclear forces are the forces that act between protons and neutrons in the nucleus and ensure the existence of atomic nuclei. 08:06 The binding energy of an atomic nucleus (E_zv ) is the energy required to completely split a nucleus into individual nucleons. 08:26 What is a mass defect and how to determine it? 10:05 Calculation of binding energy. 12:22 The specific binding energy f is a physical quantity that characterizes the nucleus of a certain nuclide and is numerically equal to the binding energy per nucleon of the nucleus. 15:29 How many protons and how many neutrons are contained in the nuclei of Molybdenum (_42^96)Mo, Rhenium (_75^186)Re, Dubnium (_105^270)Db atoms? 19:30 How to determine the number of electrons in an atom? 20:47 The nucleus of an Argentum atom contains 47 protons and 108 neutrons. How many electrons are in this atom? 22:05 The nucleus of a Zirconium atom contains 91 particles. 40 electrons move around the nucleus. How many protons and neutrons are in the nucleus of this atom? 24:15 The nucleus of an atom of a certain chemical element contains 31 protons and 39 neutrons. What is this element? 26:25 What is the difference between the nuclei of the isotopes of Ferrum: (_26^54)Fe; (_26^56)Fe; (_26^57)Fe ; (_26^58)Fe? 28:46 Using the diagram of the dependence of the specific binding energy on the mass number, determine whether the decay of a nucleus consisting of 240 nucleons will be accompanied by the release or absorption of energy. Justify your answer. 30:51 Determine the mass defect of the nucleus of the Potassium isotope (_19^40)K, m_(_19^40)K =39.96400 a.u.m. 40:01 Self-test question.