J. J. Thomson goes to America

Downard, Kevin M.

doi:10.1016/j.jasms.2009.07.008

Cited by 3 publications

(4 citation statements)

References 17 publications

(45 reference statements)

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“…Like others in Britain, J. J. was shocked by the news. He had sailed safely to North America three times earlier . His last voyage had taken place less than 3 years prior to the sinking of the Titanic.…”

Section: A Tale Of Two Sinkingsmentioning

confidence: 99%

“…He had sailed safely to North America three times earlier. [2] His last voyage had taken place less than 3 years prior to the sinking of the Titanic. This trip, in 1909, was to open the 29th meeting of the British Association for the Advancement of Science (BAAS) in Winnipeg, Canada [3] as its President.…”

Section: A Tale Of Two Sinkingsmentioning

confidence: 99%

“…The discovery of 22 Ne was reported a year later. [6] GEOFFREY INGRAM TAYLOR As Thomson began his work on positive rays in 1905, [2] a young Geoffrey Taylor joined Trinity College to study for a Bachelor of Arts in mathematics and physics. He was supported by a scholarship and supplementary funds from the local county council.…”

Section: Thomson's Cathode Ray Experiments Of 1912mentioning

confidence: 99%

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1912: a titanic year for mass spectrometry

Downard

2012

J. Mass. Spectrom.

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The 1912 sinking of the Titanic continues to capture the imagination and fascination of the general public. The year coincides with the birth of mass spectrometry that began with the cathode ray experiments performed by Joseph John (J. J.) Thomson in Cambridge. Modifications made to Thomson's cathode ray apparatus by Francis William Aston, resulted in an increase in the brightness of the positive rays that aided their detection. This led to the discovery of heavy isotopes for many of the chemical elements in the ensuing decades. As the discovery of (22) Ne was reported in 1913, another of Thomson's students was taking part in an expedition to help save future ocean liners from the fate of the Titanic. Geoffrey Ingram Taylor took part in the first ice patrol of the North Atlantic in 1913 aboard the SS Scotia to investigate the formation and position of icebergs. This article, 100 years on, describes Taylor's work and its impact on safe ocean passage across the Atlantic.

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Section: A Tale Of Two Sinkingsmentioning

confidence: 99%

Section: A Tale Of Two Sinkingsmentioning

confidence: 99%

Section: Thomson's Cathode Ray Experiments Of 1912mentioning

confidence: 99%

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1912: a titanic year for mass spectrometry

Downard

2012

J. Mass. Spectrom.

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“…This can lead instructors to learn from, and use, resources like textbooks to teach the material to a greater extent compared to other content in General Chemistry. In addition, for these experiments, there are a large number of instructional resources beyond the textbook or eText − that instructors can consult, including Web sites − and computer simulations. − Of course, there are also historical accounts in books − and articles. − This topic is also novel because its learning objectives and accompanying assessments may not be well-defined compared to other topics in the course. For example, the representative learning objective to “describe the experiments that led to the discovery of the electron and its charge” is more open-ended and subject to interpretation by the teacher compared to an objective like “calculate the density or molar mass of a gas using the ideal-gas equation.”…”

Section: Introductionmentioning

confidence: 99%

Using ChatGPT to Support Lesson Planning for the Historical Experiments of Thomson, Millikan, and Rutherford

Clark,

Fhaner,

Stoltzfus

et al. 2024

J. Chem. Educ.

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Four General Chemistry instructors investigated the use of ChatGPT-4 to improve their lessons plans for the historical experiments of Thomson, Millikan, and Rutherford. The instructors varied in their prior knowledge for these experiments and their initial lessons addressed somewhat different learning objectives. This led to different conversations with the chatbot as the instructors used the resource in different ways and discussed topics they each found relevant. The output from ChatGPT-4 was robust and each instructor identified ways it could be used to improve their instruction. The chatbot was able to accomplish instructional tasks these instructors found useful, such as outlining a lesson plan, recommending resources, discussing instructional strategies, describing calculations, offering explanations for different levels of leaners, and generating assessments. A limitation was its ability create images or visual aids the instructors found useful. Overall, these instructors found the chatbot could support, but not replace, an instructor in a course like General Chemistry.

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History

Prohaska

2014

Sector Field Mass Spectrometry for Elemental and Isotopic Analysis

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The general principle of the idea of separating our world into the smallest increments possible, atoms, started with Democrit (460–370 BC), the old Greek philosopher, who asked the origin of all questions: “What is that in truth being?” The efforts of scientists have – for a long time - had the goal to visualise these atoms by inventing tools to monitor the material world around us into its smallest possible increments. As a result, scientists involved in spectroscopy have created and established tools to identify the elemental composition of our material world and to measure the weight of atoms by a very special balance: the mass spectrometer. In this chapter, the history of mass spectrometry is described and highlights of the success story are given with a special emphasis on magnetic sector field mass spectrometry and its use in elemental and isotopic analysis. The roots of sector field instruments based on the observation of cathode rays and Kanalstrahlen, the first mass spectrometers and the determination of isotopes, the early commercialisation of mass spectrometry as well as the last 50 years of novel developments of mass separators and ion sources are covered to introduce give insight into the history of mass spectrometry.

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J. J. Thomson goes to America

Cited by 3 publications

References 17 publications

1912: a titanic year for mass spectrometry

1912: a titanic year for mass spectrometry

Using ChatGPT to Support Lesson Planning for the Historical Experiments of Thomson, Millikan, and Rutherford

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