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Starting from the fundamental constituents of matter, this book provides a more precise idea of what an atom or a molecule is by using theories which reproduce the experimental behaviour of matter. Aware of the comprehension difficulties that quantum theory can raise in the minds of students, the book insists on the importance of the physical principles which underlie it, such as the Coulomb relationship, the particle-wave duality, the notion of indeterminism, presence probability and the virial theorem.
Foreword
The Macroscopic and Microscopic Domains
Highlighting the Complexity of Atoms
Chemical Elements
Periodic Classification of Elements (Descriptive)
Some Reminders About the Wave-Like Nature of Light
The Corpuscular Aspect of Light
The Davisson and Germer Experiment
The Jönsson Experiment (1961)
The Möllenstedt Experiment (1955)
The Meaning of the Square of the Amplitude
The Franck-Hertz Experiment
The Emission Spectrum of Atomic Hydrogen
The Absorption Spectrum Of Atomic Hydrogen
Generalization to Hydrogenic Atoms
Bohr’s Model of Hydrogenic Atoms
Perfecting Bohr’s Model
Theoretical Explanation of Energy Quantization
Schrödinger’s Model of the Hydrogen Atom
Extension of the Model to Polyelectronic Atoms
The Chemical Bond According to Lewis
The Chemical Bond according to Molecular Orbital (MO) Theory
Theories Dealing with Molecular Geometry
Extended Systems and the Hückel Lcao Method
Electrocyclic Reactions
Woodward-Hoffmann’s Selection Rules
Acknowledgements