The Theory of Spectra and Atomic Constitution

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CONTENTS ESSAY I ON THE SPECTRUM OF HYDROGEN Empirical spectral laws Laws of temperature radiation The nuclear theory of the atom Quantum theory of spectra Hydrogen spectrum The Pickering lines Other spectra ESSAY II ON THE SERIES SPECTRA OF THE ELEMENTS I. Introduction II. General Principles of the Quantum Theory of Spectra Hydrogen spectrum The correspondence principle General spectral laws Absorption and excitation of radiation III. Development of the Quantum Theory of Spectra Effect of external forces on the hydrogen spectrum The Stark effect The Zeeman effect Central perturbations Relativity effect on hydrogen lines Theory of series spectra Correspondence principle and conservation of angular momentum The spectra of helium and lithium Complex structure of series lines IV. Conclusion ESSAY III THE STRUCTURE OF THE ATOM AND THE PHYSICAL AND CHEMICAL PROPERTIES OF THE ELEMENTS I. Preliminary The nuclear atom The postulates of the quantum theory Hydrogen atom Hydrogen spectrum and X-ray spectra The fine structure of the hydrogen lines Periodic table Recent atomic models II. Series Spectra and the Capture of Electrons by Atoms Arc and spark spectra Series diagram Correspondence principle III. Formation of Atoms and the Periodic Table First Period. Hydrogen-Helium Second Period. Lithium-Neon Third Period. Sodium-Argon Fourth Period. Potassium-Krypton Fifth Period. Rubidium-Xenon Sixth Period. Caesium-Niton Seventh Period Survey of the periodic table IV. Reorganization of Atoms and X-Ray Spectra Absorption and emission of X-rays and correspondence principle ]X-ray spectra and atomic structure Classification of X-ray spectra Conclusion