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1. www.khanacademy.org › science › chemistryDiscovery of the electron and nucleus (article) | Khan Academy

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   Key points. J.J. Thomson's experiments with cathode ray tubes showed that all atoms contain tiny negatively charged subatomic particles or electrons. Thomson's plum pudding model of the atom had negatively-charged electrons embedded within a positively-charged "soup."

2. chem.libretexts.org › Bookshelves › General_Chemistry1.6: The Discovery of the Electron - Chemistry LibreTexts

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   Because like charges repel each other and opposite charges attract, Thomson concluded that the particles had a net negative charge; these particles are now called electrons. Most relevant to the field of chemistry, Thomson found that the mass-to-charge ratio of cathode rays is independent of the nature of the metal electrodes or the gas, which ...

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   Why did JJ Thomson discover electrons?

   • JJ Thomson discovered the electron in 1897 and there are tons of videos about it. However, most videos miss what JJ Thomson himself said was the motivating factor: a debate about how cathode rays move. Want to know not only how but why electrons were discovered?

   JJ Thompson's Discovery of Electron: Cathode Ray Tube Experiment Expl…

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   What was Thomson's role in the discovery of the electron?

   • Thomson had identified one of the primary building blocks of matter—what came to be called the electron. Although Thomson's role in the discovery of the electron is indisputably central, it would be a mistake to believe it to be exclusively his accomplishment.

   J. J. Thomson, the Discovery of the Electron, and the Study of Atomic

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   What if Thomson's model was correct?

   • If Thomson’s model of the atom were correct, the positively-charged α particles should crash through the uniformly distributed mass of the gold target like cannonballs through the side of a wooden house. They might be moving a little slower when they emerged, but they should pass essentially straight through the target (Figure 4.4.7b 4.4. 7 b ).

   4.4: Discovery of the Proton - The Nuclear Atomic Model

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   Did Rutherford prove Thomson's model of the atom was incorrect?

   • In a single famous experiment, however, Rutherford showed unambiguously that Thomson’s model of the atom was incorrect. Rutherford aimed a stream of α particles at a very thin gold foil target (Figure 2.4.7a 2.4. 7 a) and examined how the α particles were scattered by the foil.

   2.4: The Discovery of the Electron - Chemistry LibreTexts

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4. chem.libretexts.org › Courses › Sacramento_City2.4: The Discovery of the Electron - Chemistry LibreTexts

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   Jun 29, 2017 · Because like charges repel each other and opposite charges attract, Thomson concluded that the particles had a net negative charge; these particles are now called electrons. Most relevant to the field of chemistry, Thomson found that the mass-to-charge ratio of cathode rays is independent of the nature of the metal electrodes or the gas, which ...

5. chem.libretexts.org › Courses › can4.4: Discovery of the Proton - The Nuclear Atomic Model

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   Dec 13, 2023 · In a single famous experiment, however, Rutherford showed unambiguously that Thomson’s model of the atom was incorrect. Rutherford aimed a stream of α particles at a very thin gold foil target (Figure \(\PageIndex{7a}\)) and examined how the α particles were scattered by the foil.

6. www.rigb.org › explore-science › exploreSubatomic science: JJ Thomson's discovery of the electron

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   Jun 27, 2022 · JJ Thomson's cathode ray tube experiments. Thomson, a highly respected theoretical physics professor at Cambridge University, undertook a series of experiments designed to study the nature of electric discharge in a high-vacuum cathode-ray tube – he was attempting to solve a long-standing controversy regarding the nature of cathode rays, which occur when an electric current is driven through ...

7. kathylovesphysics.com › discovery-of-electronsJJ Thompson's Discovery of Electron: Cathode Ray Tube ...

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   Sep 7, 2017 · Why did J. J. Thomson discover the electron in 1897? Well, according to Thomson: “the discovery of the electron began with an attempt to explain the discrepancy between the behavior of cathode rays under magnetic and electric forces [4] .”

8. educationalgames.nobelprize.org › educationalThe Electron Discovery Experiment - Nobel Prize

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   Thomson's result was. e/m = 1.8 10-11 coulombs/kg. The particle that J.J.Thomson discovered in 1897, the electron, is a constituent of all the matter we are surrounded by. All atoms are made of a nucleus and electrons.