Okoro Blessing Nkiruka.Jun 23, 2026
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5 Nuclear physics 5.1 The nuclear model of the atom 5.1.1 The atom 1 2 Describe the structure of the atom in terms of a positively charged nucleus and negatively charged electrons in orbit around the nucleus Describe how alpha-particle scattering experiments provide evidence for: (a) a very small nucleus surrounded by mostly empty space (b) a nucleus containing most of the mass of the atom (c) a nucleus that is positively charged 5.1.2 The nucleus 1 2 3 Describe the composition of the nucleus in terms of protons and neutrons Describe how atoms form positive ions by losing electrons or negative ions by gaining electrons Define the terms proton number (atomic number) Z and nucleon number (mass number) A and be able to calculate the number of neutrons in a nucleus 4 Explain the term nuclide and use the nuclide notation A ZX 5 Explain what is meant by an isotope and state
