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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."
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.
Of all the physicists associated with determining the structure of the atom, Thomson remained most closely aligned to the chemical community. His nonmathematical atomic theory—unlike early quantum theory—could also be used to account for chemical bonding and molecular structure (see Gilbert Newton Lewis and Irving Langmuir).
His experiments to determine the nature of positively charged particles, with Francis William Aston, were the first use of mass spectrometry and led to the development of the mass spectrograph. [2] [3] Thomson was awarded the 1906 Nobel Prize in Physics for his work on the conduction of electricity in gases. [4]
Jun 14, 2021 · The goal of each atomic model was to accurately represent all of the experimental evidence about atoms in the simplest way possible. Following the discovery of the electron, J.J. Thomson developed what became known as the " plum pudding " model in 1904.
Apr 11, 2024 · In the process, the Rutherford atomic model supplanted the so-called plum-pudding model of atomic structure proposed by Lord Kelvin; the latter is known as the Thomson atomic model because of the strong support Thomson gave it for a few years.
Jan 19, 2016 · This was the basis of the atomic theory devised by English physicist J.J. Thompson in the late 19th an early 20th centuries. As part of the revolution that was taking place at the time,...
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