Open AccessA critical study of spectral series. Part II.—The p and s sequences and the atomic volume term
Publication year - 1912
Publication title -
proceedings of the royal society of london. series a, containing papers of a mathematical and physical character
Language(s) - English
Resource type - Journals
eISSN - 2053-9150
pISSN - 0950-1207
DOI - 10.1098/rspa.1912.0035
Subject(s) - series (stratigraphy) , confusion , sequence (biology) , principal (computer security) , chemical nomenclature , notation , element (criminal law) , mathematics , europium , order (exchange) , chemistry , combinatorics , arithmetic , computer science , ion , law , psychoanalysis , psychology , paleontology , biochemistry , organic chemistry , finance , political science , economics , biology , operating system
This is a sequel to a paper on the same subject published in the 'Philosophical Transactions.' vol. 210 (1910). The sequences which give the principal and the sharp series are discussed as they occur in the second and third groups of the periodic table of the elements, and it is found that the sequences, or types of formulæ, which in the alkalies give the principal and sharp series, here give the sharp and principal. In order to prevent confusion the notation P and S sequence is changed top ands sequence, the letters P, S, being reserved for principal and sharp series. Additional evidence is afforded to show that these sequences depend on the atomic volumes of elements in a quite definite way. An attempt is made to allot the S and D series of europium and of radium. The spectrum of Eu affords evidence that the element fills the gap between Cd and Hg, and from the series formulæ of both elements regarded as functions of their atomic volumes probable values of their densities are obtained, viz., 12·58 for Eu and either 5·10 or 6·12 for Ra.