Class 12 NCERT • Physics Part 2 (New Syllabus)
Physics Part 2 Ch 12: Atoms
Select a topic or study module below to explore alpha particle scattering, Rutherford’s nuclear atom model, atomic spectra, Bohr’s model of the hydrogen atom, energy levels, line spectra of hydrogen, de Broglie’s explanation of Bohr’s postulates, and comprehensive textbook numerical solutions.
Topic 01 • Rutherford’s Scattering
Exploring Geiger-Marsden Experiment, Impact Parameter, Distance of Closest Approach, and Nuclear Model of Atom
Topic 02 • Atomic Spectra
Analyzing Emission and Absorption Spectra, Rydberg Formula, and Spectral Series (Lyman, Balmer, Paschen)
Topic 03 • Bohr’s Model
Studying Bohr’s Postulates, Quantization of Angular Momentum, Stable Orbits, and Velocity Derivations
Topic 04 • Orbit Radius & Velocities
Investigating Bohr Radius Formula, Dependence on Principal Quantum Number n, and Orbital Frequencies
Topic 05 • Energy Levels
Examining Total Energy Expression, Ground State, Ionization Energy, Excitation Energy, and Frequency Conditions
Topic 06 • de Broglie Explanation
Analyzing Standing Matter Waves on Circular Electron Orbits, Circumference Conditions, and Wave-Particle Harmony
Topic 07 • Model Limitations
Studying Multi-Electron Atom Failures, Fine Structure, Zeeman Effect, and Quantum Mechanical View Preview
Module 08 • Solutions & Numericals