Lesson presentation. IB physics first exams 2025, syllabus section E1 in pdf, ppt & odp format. 67 slides. Geiger-Marsden experiment, nuclear notation, atomic energy levels and spectra, photons, Rutherford scattering, hydrogen atom energy levels, quantized angular momentum in electron energy levels. Emphasis on graphics with clear, bespoke figures. Step-by-step worked examples. Includes a short quiz at the end modeled on past paper multiple choice questions. Unit test for syllabus section E.1 (S