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Apr 11, 2024 · George Paget Thomson. J.J. Thomson, English physicist who helped revolutionize the knowledge of atomic structure by his discovery of the electron (1897). He received the Nobel Prize for Physics in 1906 and was knighted two years later. Learn more about his life, career, and legacy.
- George Paget Thomson
Sir Joseph John Thomson OM FRS [1] (18 December 1856 – 30 August 1940) was a British physicist and Nobel Laureate in Physics, credited with the discovery of the electron, the first subatomic particle to be found.
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."
- How can we calculate e/m value of elactron?The angle of deflection in the thomson experiment depends on the e/m value. This is because F = ma So a = F/m F is proportional to e So a is propor...
- comparing thomsons exp. and rutherford's exp. why does the rays deflect in rutherford's model due to...@Afeefdk Because they very different experiments...Look at both the experiments. In the Thomson's experiment, J.J Thompson didn't strike the cathod...
- In th Rutherford experiment, why did he use alpha particles ( He2+) ? wouldn't it have been better i...Rutherford was interested in radio-chemistry (radioactivity) and what it might reveal about the atom. is focus was on alpha particles (from alpha r...
- How Rutherford told that atom is like a solar system?on which base ?Because he used classical physics (although he quantized the angular momentum) to conceive his model....and classical physics is based on intuitive...
- why did we have to name positive ions cations and not anions, since most of the naming in science se...The negatively charged electrode is the anode, this is where the electrons in a current originate. The positively charged electrode is the cathode...
- How did Rutherford make the alpha particles of helium and how did he concentrate those particles so ...He put the radium in a container with only one 'hole' for the alpha particles to get out. Any alpha particles going in other directions simply don'...
- is anode rays consist of proton ?You are right, both kinds of rays are emitted simultaneously. the cathode rays consist of electrons, while the anode/canal rays are the positively...
Feb 25, 2020 · The J.J. Thomson contribution to science helped revolutionize the understanding of atomic structure. He contributed extensively to the field of physics and chemistry by discovering the existence of electrons, developing the mass spectrometer and determining the presence of isotopes.
Feb 2, 2020 · In 1903, Thomson proposed a model of the atom consisting of positive and negative charges, present in equal amounts so that an atom would be electrically neutral. He proposed the atom was a sphere, but the positive and negative charges were embedded within it.
- Anne Marie Helmenstine, Ph.D.
J. J. Thomson took science to new heights with his 1897 discovery of the electron – the first subatomic particle. He also found the first evidence that stable elements can exist as isotopes and invented one of the most powerful tools in analytical chemistry – the mass spectrometer.
Overview. Late in the nineteenth century physicists were working hard to understand the properties of electricity and the nature of matter. Both subjects were transformed by the experiments of J. J. Thomson, who in 1897 showed the existence of the charged particles that came to be known as electrons.
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