CHAPTER 4

Atomic Structure

Chapter Highlights

Constituent of atoms, Thomson atomic model, Rutherford model, Electronic structutre of atom, Planck theory, Spectrum, Bohr’s model, Hydrogen spectrum, Dual nature theory of matter, de Broglie relation. Uncertainty principle, Quantum mechanical model, Shapes of orbitals, Quantum number and Aufbau, Pauli, Hund’s Law and various levels of multiple-choice questions.

ATOM AND ITS CONSTITUENTS
ATOM AND ATOMIC THEORY
  • Atom (Greek: atomos) means indivisible or uncuttable.
  • The words atom and atomic theory were introduced by Dalton in 1808 while explaning the atomic model.

Following are the main postulates of atomic theory as proposed by Dalton:

  • Atom is the smallest, indivisible fundamental particle.

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