Atoms

Physics · Chapter 19 · Unit 8: Atoms and Nuclei

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Your path through this chapter

1
Visual lesson Beta
1. Part 1: The nuclear atom and Bohr’s orbits18 slides
2. Part 2: Energy levels and the hydrogen spectrum18 slides
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Notes Beta
6 sections with key terms, formulas and exam tips.
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Flashcards Beta
30 cards for quick recall of key terms and facts.
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Practice
71 board-style questions with instant checks: Numerical 19, Short answer 17, Multiple choice 15, Assertion and reason 6.
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Chapter test Free
Short and long chapter tests in board pattern, with results and analysis.
- Chapter test (long) — Atoms · 40 marks · 100 min
- Chapter test (short) — Atoms · 20 marks · 50 min
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Geiger-Marsden alpha-scattering experiment; Rutherford's nuclear model; distance of closest approach and size of nucleus
Bohr's postulates for the hydrogen atom; radius, orbital velocity, kinetic, potential and total energy of the electron
Energy level diagram; Lyman, Balmer, Paschen, Brackett and Pfund series; Rydberg constant