{"id":1166,"date":"2023-02-27T00:44:25","date_gmt":"2023-02-26T19:14:25","guid":{"rendered":"https:\/\/readingsbell.com\/study-material\/?p=1166"},"modified":"2023-02-27T20:45:50","modified_gmt":"2023-02-27T15:15:50","slug":"jj-thomson-atomic-model","status":"publish","type":"post","link":"https:\/\/readingsbell.com\/study-material\/jj-thomson-atomic-model\/","title":{"rendered":"JJ Thomson’s Atomic Model – Plum Pudding Model"},"content":{"rendered":"

Definition – JJ Thomson’s Atomic Model<\/strong>
\n<\/span><\/h3>\n

\u00a0<\/strong><\/p>\n

According to <\/span>JJ Thomson’s atomic model<\/b>, an atom comprises a positively charged material with negatively charged electrons dispersed within it.\u00a0<\/span>Electrons<\/strong>\u00a0were dispelled randomly within the atom.<\/span><\/p>\n

\"JJ<\/p>\n

The\u00a0atomic model of JJ Thomson\u00a0<\/b>was later shown wrong. However, it laid the foundation of the future model of the\u00a0atomic structure<\/b>\u00a0and was a significant milestone in the development of atomic theory.<\/p>\n

Main points of JJ Thomson’s atomic model<\/strong><\/h3>\n
    \n
  1. The\u00a0atom<\/strong>\u00a0is made up of a positively charged soup with negatively charged electrons dispersed within it.<\/li>\n
  2. The\u00a0electrons<\/strong>\u00a0are randomly distributed within the atom, giving it a uniform positive charge.<\/li>\n
  3. The overall size of the atom is much larger than its electrons.<\/li>\n
  4. The atom is stable and neutral due to the balanced\u00a0<\/span>positive<\/strong>\u00a0and\u00a0<\/span>negative charges.<\/strong><\/li>\n
  5. The model is based on\u00a0cathode ray experiments<\/strong>\u00a0Thomson and his colleagues conducted, which led to the discovery of the electron.<\/li>\n<\/ol>\n

    Thomson’s atomic model\u00a0<\/b>laid the foundation for future models of\u00a0atomic structure<\/b>\u00a0and was a significant milestone in the development of atomic theory.<\/p>\n

    Limitations of JJ Thomson\u2019s atomic model<\/b><\/h3>\n

    The limitations of\u00a0<\/span>JJ Thomson’s atomic<\/strong>\u00a0model are as follows:<\/span><\/p>\n

      \n
    1. Thomson\u00a0<\/strong>did not explain the arrangement of\u00a0<\/span>electrons<\/strong>\u00a0in an\u00a0<\/span>atom<\/strong>\u00a0or the concept of\u00a0<\/span>electron shells<\/strong>.<\/span><\/li>\n
    2. It failed to account for the s<\/span>pectral lines<\/strong>\u00a0observed in the emission spectra of\u00a0<\/span>atoms.<\/strong><\/li>\n
    3. JJ Thomson’s atomic model<\/strong>\u00a0did not account for the<\/span>\u00a0stability of atoms<\/strong>\u00a0and the<\/span>\u00a0phenomenon of isotopes<\/strong>.<\/span><\/li>\n
    4. Thomson\u00a0<\/strong>did not explain the observed periodic trends in the properties of elements in the periodic table.<\/span><\/li>\n
    5. Thomson’s atomic<\/strong>\u00a0model did not explain the formation of chemical bonds between atoms.<\/span><\/li>\n<\/ol>\n

      These limitations led to the development of new and improved models of atomic structure, including the\u00a0Rutherford<\/strong>\u00a0and\u00a0Bohr<\/strong>\u00a0models.<\/p>\n

      Plum Pudding Model<\/strong><\/h3>\n

      JJ\u00a0<\/b>Thomson’s atomic model<\/b>, also known as the “Plum Pudding<\/b>” model, was proposed in\u00a01904.<\/strong><\/p>\n

      According to this model, an atom was composed of a\u00a0<\/span>positively charged material<\/strong>, similar to a\u00a0<\/span>pudding,<\/strong>\u00a0with n<\/span>egatively charged electrons<\/strong>\u00a0dispersed, like\u00a0<\/span>plums in a pudding.<\/strong>\u00a0The electrons dispelled randomly within the atom, giving it a uniform positive charge.<\/span><\/p>\n","protected":false},"excerpt":{"rendered":"

      Definition – JJ Thomson’s Atomic Model \u00a0 According to JJ Thomson’s atomic model, an atom comprises a positively charged material with negatively charged electrons dispersed within it.\u00a0Electrons\u00a0were dispelled randomly within the atom. The\u00a0atomic model of JJ Thomson\u00a0was later shown wrong. However, it laid the foundation of the future model of the\u00a0atomic structure\u00a0and was a significant milestone in the development of atomic theory. Main points of JJ Thomson’s atomic model The\u00a0atom\u00a0is made up of a positively charged soup with negatively charged electrons dispersed within it. The\u00a0electrons\u00a0are randomly distributed within the atom, giving it a uniform positive charge. The overall size of<\/p>\n","protected":false},"author":1,"featured_media":1141,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[67],"tags":[],"class_list":["post-1166","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-science"],"yoast_head":"\nJJ Thomson's Atomic Model - Plum Pudding Model - Reading Bell<\/title>\n<meta name=\"description\" content=\"According to JJ Thomson's atomic model, an atom comprises a positively charged material with negatively charged electrons dispersed within it\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/readingsbell.com\/study-material\/jj-thomson-atomic-model\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"JJ Thomson's Atomic Model - 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