Structure of Atom
Class 11 Chemistry Structure of Atom — discovery of electron, proton and neutron, Thomson and Rutherford models, Bohr model of hydrogen, hydrogen spectrum, de Broglie and Heisenberg, quantum numbers, orbital shapes and electronic configuration with solved NCERT numericals.
Study by topic — one focused page each
Sub-atomic Particles & Atomic Models
For a long time the atom was believed to be the smallest, indivisible unit of matter — Dalton's word atomos literally means uncuttable . Experiments w…
Start this topic → 2Quantum Mechanical Model
Bohr's neat orbits could not survive two revolutionary ideas of the 1920s: that matter has a wave nature , and that the very act of locating a tiny pa…
Start this topic → 3Electronic Configuration
Once we know that electrons occupy orbitals labelled by quantum numbers, the next question is practical: in a real atom, which orbitals get filled, an…
Start this topic →Chapter-wide tests
Online Test
20 MCQ • 15 min
IMO / Olympiad Practice
Olympiad level • 15 min
📝 Full Chapter Test (Download & Print)
40 marks • 90 min • with answer key