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Nov 21, 2023 · Learn what Robert Millikan discovered and the contributions of Robert Millikan to atomic theory. Explore the oil drop experiment and its insights on the electron. Updated: 11/21/2023.
- How did Robert Millikan change the atomic model?Prior to Robert Millikan's famous oil drop experiment, in which he measured the charge on a single electron, it was not known if electrons even had...
- What 3 things did Millikan discover?Robert Millikan made many contributions to our understanding of physics. He is famous for measuring the value of the elementary charge in the oil d...
- What was Robert Millikan's discovery?Robert Millikan is most well known for discovering value of the elementary charge, which is the charge on a single electron. He measured the elemen...
Outline milestones in the development of modern atomic theory; Summarize and interpret the results of the experiments of Thomson, Millikan, and Rutherford; Describe the three subatomic particles that compose atoms; Define isotopes and give examples for several elements
Outline milestones in the development of modern atomic theory; Summarize and interpret the results of the experiments of Thomson, Millikan, and Rutherford; Describe the three subatomic particles that compose atoms; Define isotopes and give examples for several elements
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Philosophical atomism
The idea that matter is made up of discrete units is a very old idea, appearing in many ancient cultures such as Greece and India. The word "atom" (Greek: ἄτομος; atomos), meaning "uncuttable", was coined by the Pre-Socratic Greek philosophers Leucippus and his pupil Democritus (c.460–c.370 BC). Democritus taught that atoms were infinite in number, uncreated, and eternal, and that the qualities of an object result from the kind of atoms that compose it. Democritus's atomism was refined and el...
John Dalton
Near the end of the 18th century, two laws about chemical reactions emerged without referring to the notion of an atomic theory. The first was the law of conservation of mass, closely associated with the work of Antoine Lavoisier, which states that the total mass in a chemical reaction remains constant (that is, the reactants have the same mass as the products). The second was the law of definite proportions. First established by the French chemist Joseph Proustin 1797 this law states that if...
Avogadro
The flaw in Dalton's theory was corrected in principle in 1811 by Amedeo Avogadro. Avogadro had proposed that equal volumes of any two gases, at equal temperature and pressure, contain equal numbers of molecules (in other words, the mass of a gas's particles does not affect the volume that it occupies). Avogadro's lawallowed him to deduce the diatomic nature of numerous gases by studying the volumes at which they reacted. For instance: since two liters of hydrogen will react with just one lit...
Andrew G. van Melsen (1960) [First published 1952]. From Atomos to Atom: The History of the Concept Atom. Translated by Henry J. Koren. Dover Publications. ISBN 0-486-49584-1.J. P. Millington (1906). John Dalton. J. M. Dent & Co. (London); E. P. Dutton & Co. (New York).Jaume Navarro (2012). A History of the Electron: J. J. and G. P. Thomson. Cambridge University Press. ISBN 978-1-107-00522-8.Alan J. Rocke (1984) Chemical Atomism in the Nineteenth Century: From Dalton to Cannizzaro, Ohio State University Press, Columbus (open access full text at http://digital.case.edu/islandora/object/...The American scientist Robert Millikan (1868–1953) carried out a series of experiments using electrically charged oil droplets, which allowed him to calculate the charge on a single electron. Millikan created microscopic oil droplets, which could be electrically charged by friction as they formed or by using X-rays.
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Outline milestones in the development of modern atomic theory; Summarize and interpret the results of the experiments of Thomson, Millikan, and Rutherford; Describe the three subatomic particles that compose atoms; Define isotopes and give examples for several elements
Outline milestones in the development of modern atomic theory; Summarize and interpret the results of the experiments of Thomson, Millikan, and Rutherford; Describe the three subatomic particles that compose atoms; Define isotopes and give examples for several elements
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