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Thomson atomic model, earliest theoretical description of the inner structure of atoms, proposed about 1900 by William Thomson (Lord Kelvin) and strongly supported by Sir Joseph John Thomson, who had discovered (1897) the electron, a negatively charged part of every atom.
- J.J. Thomson Biographical Data
- Thomson Atomic Theory
- Interesting Facts About J.J. Thomson
Tomson was born December 18, 1856, Cheetham Hill, near Manchester, England. He died August 30, 1940, Cambridge, Cambridgeshire, England. Thomson is buried in Westminster Abbey, near Sir Isaac Newton. J.J. Thomson is credited with the discovery of the electron, the negatively charged particle in the atom. He is known for the Thomson atomic theory. M...
Thomson's discovery of the electron completely changed the way people viewed atoms. Up until the end of the 19th century, atoms were thought to be tiny solid spheres. 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...
Prior to Thomson's discovery of electrons, scientists believed the atom was the smallest fundamental unit of matter.Thomson called the particle he discovered 'corpuscles' rather than electrons.Thomson's master's work, Treatise on the motion of vortex rings, provides a mathematical description of William Thomson's vortex theory of atoms. He was awarded the Adams Prize in 1884.Thomson discovered the natural radioactivity of potassium in 1905.- 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).
Thomson's prize-winning master's work, Treatise on the motion of vortex rings, shows his early interest in atomic structure. In it, Thomson mathematically described the motions of William Thomson's vortex theory of atoms. Thomson published a number of papers addressing both mathematical and experimental issues of electromagnetism.
- George Paget Thomson, Joan Paget Thomson
- Trinity College, Cambridge
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."
Apr 2, 2014 · Thomson determined that all matter is made up of tiny particles that are much smaller than atoms. He originally called these particles 'corpuscles,' although they are now called electrons. This...
