Atomic Structure | Atomic Discoveries Timeline in odia (Lec-1)

Описание: 📘 Unit–II: Atomic Structure | Class–1
⏳ Timeline of Atomic Discoveries & Quantum Theory
🔹 This video explains the complete timeline of atomic structure and the development of quantum theory in a clear and chronological manner.
🔹 Topics covered in this lecture:
Dalton’s Atomic Theory (1808)
Cathode ray discharge tube experiment (1850)
Balmer series of hydrogen spectrum (1885)
Lyman, Paschen, Brackett and Pfund series (1888–1890)
Discovery of anode rays by Goldstein (1886)
Discovery of electron (1897)
J. J. Thomson’s atomic model (1898)
Gold foil scattering experiment (1909)
Rutherford’s nuclear model of atom (1911)
Bohr’s model of hydrogen atom (1913)
Proton characterization by Rutherford (1919)
de Broglie hypothesis – wave nature of matter (1924)
Discovery of spin quantum number (1925)
Schrödinger wave equation and quantum numbers n, l, m (1926)
Aufbau principle (1925–1926)
Pauli’s exclusion principle (1926)
Hund’s rule (1927)
Heisenberg uncertainty principle (1927)
Discovery of neutron by James Chadwick (1932)
Discovery of quarks (1964)
🔹 This video helps in understanding how atomic models evolved step by step and how quantum mechanics was introduced.
🎯 This video is useful for:
Class 11 Chemistry students
NEET aspirants
JEE Main & Advanced aspirants
Competitive exam preparation
Students studying Atomic Structure (Unit–II)
Beginners in Quantum Chemistry
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