===== Chapter 19: The Atomic Nucleus ===== Notes of Chapter 19: The Atomic Nucleus of “Physics XII” for FSc Part 2 published by Sindh Textbook Board, Jamshoro. These notes are very helpful to prepare Physics paper of FSc Part 2 for Sindh Board. These can also be consider as refrence notes for Federal Board, Multan Board, Faisalabad Board, Sargodha Board, Gujranwala Board, DG Khan Board, Rawalpindi Board or any other board of Pakistan. === Summary and Contents === The nucleus is the very dense region consisting of protons and neutrons at the center of an atom. It was discovered in 1911 as a result of Ernest Rutherford's interpretation of the 1909 Geiger–Marsden gold foil experiment. The proton–neutron model of the nucleus was proposed by Dmitry Ivanenko in 1932.[1] Almost all of the mass of an atom is located in the nucleus ...

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