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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.
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- Thomson Model Introduction
- Table of Contents
- Postulates of Thomson’s Atomic Model
- Limitations of Thomson’s Atomic Model
Thomson atomic modelwas proposed by William Thomson in the year 1900. This model explained the description of an inner structure of the atom theoretically. It was strongly supported by Sir Joseph Thomson, who had discovered the electron earlier. During cathode ray tube experiment, a negatively charged particle was discovered by J.J. Thomson. This e...
Postulate 1: An atom consists of a positively charged sphere with electrons embedded in it Postulate 2: An atom as a whole is electrically neutral because the negative and positive charges are equal in magnitude Thomson atomic model is compared to watermelon. Where he considered: 1. Watermelon seeds as negatively charged particles 2. The red part o...
It failed to explain the stability of an atom because his model of atom failed to explain how a positive charge holds the negatively charged electrons in an atom. Therefore, This theory also failed...Thomson’s model failed to explain the scattering of alpha particles by thin metal foilsNo experimental evidence in its support- 32 sec
Thomson's plum-pudding model of the atom is one of a series of atomic models ranging from the philosophical models of the ancient Greeks through John Dalton's chemistry-based atom to the modern quantum atom of atomic physics. Among these models, Thomson's can be considered the first modern model.
Following his discovery of the electron in 1897, British Physicist J.J. Thomson proposed a model of the atom in 1904 after doing a series of cathode tube experiments. According to his hypothesis, an atom consists of positive and negative charges present in equal amounts so that it is electrically neutral.
May 30, 2021 · According to J.J. Thomson's atomic model, the atom consists of electrons placed in a positively charged "soup,” which compensates for the electrically negative charges of the electrons. According to this model, electrons could spin freely in a drop or cloud of such a positively charged substance.
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 18, 2023 · A plum pudding model is a historical scientific model of the atom that was proposed by J.J. Thomson in 1904, shortly after he discovered the electron. The model tried to explain two properties of atoms that were known at that time: electrons are negatively charged particles,…
