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• 10:08, 9 July 2025 Kkmurray talk contribs uploaded File:Aston 1922 Figure 3.jpg (Figure 3 from [https://archive.org/details/isotopes00asto/page/n3/mode/2up Isotopes by Aston, Francis William, 1877-1945] ;Publication date :1922 ;Topics :Isotopes ;Publisher :London, E. Arnold & co. ;Collection :northeastern; blc; americana ;Contributor :Northeastern University, Snell Library ;Language :English ;Item Size :240.1M :viii, 152 p. 22 cm ;Addeddate x:2009-07-21 17:25:33 ;Call number :b11011324 ;Camera :Canon 5D ;External-identifier :urn:oclc:record:1047482055[WorldCat (this ite...)
• 21:37, 8 July 2025 Kkmurray talk contribs created page Moseley number (Created page with "{{def |def= ({{obs}}) |rel=atomic number |ref= |acronym= }} ==See also== *wikipedia:Moseley's law")
• 20:53, 6 July 2025 Kkmurray talk contribs created page Secondary ray (Created page with "{{stub}} ==See also== *SIMS")
• 20:50, 6 July 2025 Kkmurray talk contribs deleted page Thompson 1913 (content was: "<big>'''Rays of Positive Electricity and Their Application to Chemical Analyses, Joseph John Thomson, 1913''' :[http://www.archive.org/details/1913raysofpositi00thomuoft Internet Archive Online] :[https://en.wikisource.org/wiki/Rays_of_Positive_Electricity_and_Their_Application_to_Chemical_Analyses Wikisource] </big> == Preface == I have endeavoured in this book to give...", and the only contributor was "Kkmurray" (talk))
• 20:49, 6 July 2025 Kkmurray talk contribs created page Thomson 1913 (Created page with "<big>'''Rays of Positive Electricity and Their Application to Chemical Analyses, Joseph John Thomson, 1913''' :[http://www.archive.org/details/1913raysofpositi00thomuoft Internet Archive Online] :[https://en.wikisource.org/wiki/Rays_of_Positive_Electricity_and_Their_Application_to_Chemical_Analyses Wikisource] </big> == Preface == I have endeavoured in this book to give some account of the experiments on Positive Rays which have been made at the Cavendish Laboratory d...")
• 11:28, 6 July 2025 Kkmurray talk contribs created page Template talk:Aston 1922 Contents (Created page with "<pre> <big><big>'''(title goes here'''</big></big> {{Template:Aston 1922 Contents}} </pre>")
• 11:24, 6 July 2025 Kkmurray talk contribs created page Template:Aston 1922 Contents (Created page with "*Preface *Chapter I - Introduction *Chapter II - The Radioactive Isotopes *Chapter III - Positive Rays *Chapter IV - Neon *Chapter V - The Mass-Spectrograph *Chapter VI - Analysis of the Elements *Chapter VII - Analysis of the Elements (Continued) *Aston 1922/Chapter 8|Chapt...")
• 10:57, 6 July 2025 Kkmurray talk contribs created page Thompson 1913 (Created page with "<big>'''Rays of Positive Electricity and Their Application to Chemical Analyses, Joseph John Thomson, 1913; [http://www.archive.org/details/1913raysofpositi00thomuoft Internet Archive Online]'''</big> == Preface == I have endeavoured in this book to give some account of the experiments on Positive Rays which have been made at the Cavendish Laboratory during the last seven years, and which have been the subject of papers scattered through the Philosophical Magazine, the...")
• 10:37, 6 July 2025 Kkmurray talk contribs created page Rays of Positive Electricity and Their Application to Chemical Analyses (Redirected page to Thompson 1913) Tag: New redirect
• 11:07, 5 July 2025 Kkmurray talk contribs deleted page Aston 2022/Contents (content was: "#REDIRECT Aston 1922/Contents", and the only contributor was "Kkmurray" (talk))
• 11:06, 5 July 2025 Kkmurray talk contribs created page File:Aston 2022 Figure 1.jpg (Fig. 1. Diagram of the transformations of the radio-elements showing atomic number, atomic weight and period of disintegration of each product.)
• 11:06, 5 July 2025 Kkmurray talk contribs uploaded File:Aston 2022 Figure 1.jpg (Fig. 1. Diagram of the transformations of the radio-elements showing atomic number, atomic weight and period of disintegration of each product.)
• 11:06, 5 July 2025 Kkmurray talk contribs deleted page File:Aston 1922 Figure 1.jpg (content was: "#REDIRECT File:Aston 1922 Figure 2.jpg", and the only contributor was "Kkmurray" (talk))
• 16:09, 4 July 2025 Kkmurray talk contribs created page Lipidomics (Created page with "{{stub}}")
• 11:22, 4 July 2025 Kkmurray talk contribs deleted page Aston1922/Chapter 9 (content was: "#REDIRECT Aston 1922/Chapter 9", and the only contributor was "Kkmurray" (talk))
• 11:20, 4 July 2025 Kkmurray talk contribs deleted page Aston 2022/Chapter 3 (content was: "#REDIRECT Aston 1922/Chapter 3", and the only contributor was "Kkmurray" (talk))
• 18:24, 3 July 2025 Kkmurray talk contribs created page Aston 1922/Appendices (Created page with " ==APPENDIX I= Table of atomic weights and isotopes of the elements. The elements are given in order of their atomic numbers. The different periods are indicated by gaps after the inert gases. A curious relation, pointed out by Rydberg, is that the atomic numbers of all the inert gases are given by taking the series 2 (P + 2^ + 22 + 3^ + 3^ + 4^ + ) and stoppmg the summation at any term. This gives the numbers used by Langmuir (p. 95). The atomic weights given are t...")
• 18:20, 3 July 2025 Kkmurray talk contribs created page Aston 1922/Chapter 10 (Created page with "'''CHAPTER X - THE SPECTRA OF ISOTOPES''' ==108. The Spectra of isotopes== As has already been stated the first experimental work on the spectra of isotopes was that of Russell and Rossi in 1912 who failed to distinguish any difference between the spectrum of thorium and that of a mixture of thorium and ionium containing a considerable percentage of the latter. The same negative result was obtained by Exner and Haschek. During the fractional diffusion of neon no spectro...")
• 18:14, 3 July 2025 Kkmurray talk contribs created page Aston 1922/Chapter 11 (Created page with "'''CHAPTER XI - THE SEPARATION OF ISOTOPES''' ==113. The Separation of Isotopes== The importance, from purely practical and technical points of view, of the theory of isotopes would have been insignificant had its application been confined to the radioactive elements and their products, which are only present in infinitesimal quantities on the Earth. But now that the isotopic nature of many elements in everyday use has been demonstrated, the possibility of their sep...")
• 18:06, 3 July 2025 Kkmurray talk contribs moved page Aston1922/Chapter 9 to Aston 1922/Chapter 9 (Misspelled title)
• 18:04, 3 July 2025 Kkmurray talk contribs created page Aston1922/Chapter 9 (Created page with "'''CHAPTER IX - ISOTOPES AND ATOMIC NUMBERS''' ==100. The relation between chemical atomic weight and atomic number== Inasmuch as it is now recognised to be in general merely a statistical mean value the importance of the chemical atomic weight has been greatly reduced by the discovery of isotopes. Its position as the natural numerical constant associated with an element has been taken by the atomic number, though from the point of view of chemical analysis the chemical...")
• 17:57, 3 July 2025 Kkmurray talk contribs created page Aston 1922/Chapter 8 (Created page with "'''CHAPTER VIII - THE ELECTRICAL THEORY OF MATTER''' ==84. The Whole Number rule== By far the most important result of the measurements detailed in the foregoing chapters is that, with the exception of hydrogen, the weights of the atoms of all the elements measured, and therefore almost certainly of all elements, are whole numbers to the accuracy of experiment, in most cases about one part in a thousand. Of course, the error expressed in fractions of a unit increases wit...")
• 17:50, 3 July 2025 Kkmurray talk contribs created page Aston 1922/Chapter 7 (Created page with "'''CHAPTER VII - ANALYSIS OF THE ELEMENTS (Continued)''' ==72. Positive Rays of Metallic Elements== Positive rays of most of the metallic elements cannot be obtained by the ordinary discharge-tube method, since in general they have extremely low vapom'-pressures and are incapable of forming stable volatile compounds. Mercury is a notable exception to this rule, and its rays are exceedingly easy to produce. Positively charged rays which appeared to be atoms of the alkali...")
• 17:45, 3 July 2025 Kkmurray talk contribs created page Aston 1922/Chapter 6 (Created page with "==50. Arrangement of results== In this Chapter and the one following it are given the experimental results obtained from a large number of elements which have been subjected to analysis with a view to determining their constitution. This Chapter deals with those elements which, by reason of their volatiUty or properties of forming volatile compounds, can be treated by the ordinary discharge-tube method. The analysis given in all these cases is that obtained by means of t...")
• 17:40, 3 July 2025 Kkmurray talk contribs created page Aston 1922/Chapter 5 (Created page with "===30. Limitations of the parabola method=== The parabola method of analysis of positive rays described in Chapter III, though almost ideal for a general survey of masses and velocities, has objections as a method of precision, many rays are lost by colUsion in the narrow canal-ray tube ; the mean pressure in which must be at least half that in the discharge-bulb ; very fine tubes silt up by disintegration un...")
• 17:39, 3 July 2025 Kkmurray talk contribs created page Aston 1922/Chapter 4 (Created page with "===23. Positive Ray Analysis of Neon=== It is a curious and interesting point that while the first suggestion of the possi- bility of the occurrence of isotopes was obtained from the rarest of all substances on the earth's surface the radio= active elements and their products ; so the first result indicating the possibility of isotopes among the stable elements was yielded by neon, a gas of which, in a purifi...")
• 17:38, 3 July 2025 Kkmurray talk contribs moved page Aston 2022/Contents to Aston 1922/Contents (Misspelled title)
• 17:37, 3 July 2025 Kkmurray talk contribs created page Aston 2022/Contents (Created page with "==CONTENTS== CHAPTER I Introduction 1. Introduction ..... 2. Hypothesis of Dalton and Prout 3. Crookes' Meta-elements . 4. The discovery of Isotopes PAGE 1 2 4, 6 CHAPTER II The Radioactive Isotopes 5. Chemical identities among the radioactive elements 6. Spectroscopic identity of isotopes . 7. The chemical law of Radioactive change 8. Isobares ...... 9. The Radioactive Transformations . 10. The Atomic we...")
• 17:34, 3 July 2025 Kkmurray talk contribs moved page Aston 2022/Chapter 3 to Aston 1922/Chapter 3 (Misspelled title)
• 17:29, 3 July 2025 Kkmurray talk contribs created page Aston 2022/Chapter 3 (Created page with "==CHAPTER III - POSITIVE RAYS== ===14. Nature of Positive Rays=== Positive rays were dis- covered by Goldstein in 1886 in electrical discharge at low pressure. In some experiments with a perforated cathode he noticed streamers of Hght behind the perforations. This luminosity, he assumed, was due to rays of some sort which travelled in the opposite direction to the cathode rays and so passed through the apertures i...")
• 17:26, 3 July 2025 Kkmurray talk contribs moved page Aston 1922 Chapter 1 to Aston 1922/Chapter 1 (change to sub page)
• 17:24, 3 July 2025 Kkmurray talk contribs created page Aston 1922/Chapter 2 (Created page with " ==CHAPTER II - THE RADIOACTIVE ISOTOPES== ===5. Chemical identities among the radioactive elements=== Apart from the purely speculative considerations which have aheady been detailed, the theory of isotopes had its birth in the gigantic forward wave of human knowledge inaugurated by the discovery of radioactivity. It can admit- tedly be argued that, even if no radioactive elements existed, isotopes would inevitably...")
• 15:26, 3 July 2025 Kkmurray talk contribs created page Talk:Linked scan at constant B(1-(E/E0))1/2/E (Created page with "Test of math extension: <math>E=mc^2</math>")
• 11:48, 3 July 2025 Kkmurray talk contribs moved page DART ion source to Direct analysis in real time over redirect (expand)
• 11:48, 3 July 2025 Kkmurray talk contribs deleted redirect Direct analysis in real time by overwriting (Deleted to make way for move from "DART ion source")
• 21:47, 2 July 2025 Kkmurray talk contribs created page Aston 1922 Chapter 1 (Created page with " ==1. Introduction== Towards the end of the last century the attitude of science in relation to the atomic theory started= to undergo a complete and radical change. What had been before regarded as a convenient working hypothesis became with remarkable rapidity a definite statement of fact. This transformation is now complete and in any well- equipped laboratory to-day not only can individual atoms be detected but the movements of the swiftest of them can be tracked and...")
• 18:08, 2 July 2025 Kkmurray talk contribs created page Category:Gallery (Created page with "{{catsubmenu}}")
• 18:00, 2 July 2025 Kkmurray talk contribs moved page Broken/Isotope\x82\xc4\xecnumber ratio to Isotope number ratio
• 17:41, 2 July 2025 Kkmurray talk contribs created page Template talk:Gallery (Created page with "<pre>{{Final |name= |caption= }}</pre>")
• 17:40, 2 July 2025 Kkmurray talk contribs created page Template:Gallery (template to render file names into gallery images)
• 13:10, 2 July 2025 Kkmurray talk contribs moved page File:Aston 1922 Figure 1.jpg to File:Aston 1922 Figure 2.jpg (Misspelled title: Figure 2)
• 13:02, 2 July 2025 Kkmurray talk contribs created page File:Aston 1922 Figure 1.jpg
• 13:02, 2 July 2025 Kkmurray talk contribs uploaded File:Aston 1922 Figure 1.jpg
• 16:34, 30 June 2025 Kkmurray talk contribs created page Aston 1922 (Created page with "=ISOTOPES= F. W. ASTON, M.A., D.Sc, A.I.C., F.R.S. Fellow of Trinity College, Cambridge LONDON EDWARD ARNOLD & CO. 1922 [All rights reserved] Printed in Great Britain ==PREFACE== I HAVE undertaken the preparation of this book on Isotopes in response to many requests made to me by teachers of physics= and chemistry and others working in these subjects that I should publish the results obt...")
• 17:13, 28 June 2025 Kkmurray talk contribs created page American Society for Testing and Materials (Created page with "{{stub}} ==See also== *ASTM International")
• 17:12, 28 June 2025 Kkmurray talk contribs created page ASTM (Created page with "{{acr|American Society for Testing and Materials}}")
• 17:10, 28 June 2025 Kkmurray talk contribs created page Sector magnetic field (Redirected page to Magnetic sector) Tag: New redirect
• 17:09, 28 June 2025 Kkmurray talk contribs created page Translational energy-to-charge ratio (Created page with "{{stub}}")
• 17:09, 28 June 2025 Kkmurray talk contribs created page Momentum-to-charge ratio (Created page with "{{stub}}")
• 17:09, 28 June 2025 Kkmurray talk contribs created page Associative combination (Created page with "{{stub}}")