Structure of Atom — Class 11 CBSE Chemistry revision notes
A 4-page visual revision sheet for Structure of Atom, written for Class 11 CBSE Chemistry. Formulas, diagrams and the traps that cost marks, laid out to be read the night before rather than the term before. Free, and it opens inside CapCompass.
What this Structure of Atom sheet covers
- Three particles inside the atom
- Electron
- Proton
- Neutron
- Thomson's model: plum pudding
- Rutherford's alpha-scattering experiment
- Rutherford's nuclear model, and where it broke
- Atomic number, mass number, notation
- atomic number, fixes the element
- mass number, protons + neutrons
- standard notation for a nuclide
- Isotopes vs isobars
- Bohr's postulates
- Bohr model results, for H and hydrogen-like ions
- radius of the nth orbit
- energy of the nth orbit
- any transition: Rydberg formula
- Hydrogen's spectral series
- Lyman
- Balmer
- Paschen
- Brackett / Pfund
- Limitations of Bohr's model
- Dual nature of matter: de Broglie
- wavelength associated with a moving particle
- Heisenberg's uncertainty principle
- position and momentum can't both be known exactly
- Quantum mechanical model, in brief
- The four quantum numbers
- n: principal
- l: azimuthal
- m_l: magnetic
- m_s: spin
- Shapes of s, p, d orbitals
- s orbital
- p orbital
- d orbital
- Aufbau principle: the (n+l) rule
- Pauli exclusion & Hund's rule
- Electronic configuration: the exceptions
- Traps that cost marks
- Tricks that save time
How CapCompass uses this sheet
These notes are not a standalone PDF. CapCompass plans Chemistry chapter by chapter against your real exam dates and free hours, and when the plan reaches Structure of Atom the sheet opens inside the study block itself — at the page covering the sub-topic that block is on, with the timer still running. Revision arrives at the moment the plan says revise, instead of having to be gone looking for.