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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."
Jun 29, 2017 · These particles were emitted by the negatively charged cathode and repelled by the negative terminal of an electric field. 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.
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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 ...
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 ...
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] .”
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Apr 30, 2020 · He then concluded that the rays were composed of light and negatively charged particles, a universal building block of atoms. Thomson named the particles “corpuscles”, but scientists preferred the name electron which had been suggested by George Johnstone Stoney prior to Thomson’s discovery.
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.
