S3 Modern Physics: Structure of an Atom by Kalema Brian

These Senior 3 physics notes by Kalema Brian of Trinity College Nabbingo introduce atomic particles, atomic and mass numbers, nuclides and isotopes. They explain photoelectric and thermionic emission, the production and properties of cathode rays, and the parts and operation of a cathode ray oscilloscope. Further sections cover X-ray production, intensity, penetrating power, applications, hazards and precautions. Calculation tasks, multiple-choice exercises and structured questions support practice in identifying atomic composition, interpreting oscilloscope displays and explaining electron emission and X-ray tubes.