Nuclei
NCERT Class 12 Physics, Part II, Chapter 13 presents the nucleus through size, mass, charge and the mass energy relation, explaining mass defect and binding energy per nucleon and its curve. The chapter introduces radioactivity: the law of radioactive decay, half life and mean life with the units of activity. It closes with nuclear energy, describing fission with the chain reaction behind reactors and fusion with the proton proton cycle that powers the Sun, weighing the promise and control of nuclear power.
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