Structure of Atom Class 11 Chemistry Notes – Formulas & Quick Revision

Structure of Atom mein Bohr model, quantum numbers aur electronic configuration aate hain — Chemistry ka sabse conceptual chapter. Yahan aapko is chapter ke sabse important formulas aur quick revision points free milte hain — NCERT/CBSE syllabus ke hisaab se, boards aur JEE/NEET dono ke liye.

Important Formulas & Concepts — Structure of Atom

• Bohr radius: rₙ = 0.529 × n²/Z Å
• Energy: Eₙ = −13.6 × Z²/n² eV
• Rydberg: 1/λ = R_H·Z²(1/n₁² − 1/n₂²)
• c = νλ; E = hν = hc/λ
• de Broglie: λ = h/mv
• Heisenberg: Δx·Δp ≥ h/4π
• Quantum numbers: n, l (0 to n−1), m (−l to +l), s (±½)
• Orbitals in shell = n²; max electrons = 2n²

Quick Revision Points

• Aufbau: energy order (n+l) rule se — 4s pehle 3d ke
• Hund rule: degenerate orbitals mein pehle single electrons
• Pauli: koi do electrons ke chaaron quantum numbers same nahi
• Cr (3d⁵4s¹) aur Cu (3d¹⁰4s¹) exceptions rato
• Lyman UV, Balmer visible, Paschen IR series

FAQ

Quantum numbers se kya puchte hain?

Possible values, orbitals count aur electron configuration — direct scoring questions.

Kya spectrum ke numericals covered hain?

Haan, complete PDF mein Rydberg-based solved numericals aur energy diagrams hain.

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