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- Thomson knew that atoms had an overall neutral charge. Therefore, he reasoned that there must be a source of positive charge within the atom to counterbalance the negative charge on the electrons. This led Thomson to propose that atoms could be described as negative particles floating within a soup of diffuse positive charge.
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Thomson knew that atoms had an overall neutral charge. Therefore, he reasoned that there must be a source of positive charge within the atom to counterbalance the negative charge on the electrons. This led Thomson to propose that atoms could be described as negative particles floating within a soup of diffuse positive charge.
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.
- The Editors of Encyclopaedia Britannica
According to Thomson’s atomic model, an atom is made up of a positively charged sphere into which negatively charged electrons are implanted. Because electrons and protons have the same magnitude, an atom as a whole is electrically neutral.
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- Why was Thomson’s atomic model discarded?It was discarded because he was unable to precisely account for the stability of the atom. He proposed that electrons are distributed in the atom i...
- What is the important feature of Thomson atomic model?The following are the characteristics of the Thomson model of an atom: (i) An atom is made up of a positively charged sphere in which electrons ar...
- To which fruit has Thomson’s model been compared to?The model was compared to a watermelon because the red edible part of a watermelon was compared to the sphere with a positive charge, and the black...
- What was missing from Thomson’s atomic model?His model lacked a nucleus, protons, and neutrons.
According to his hypothesis, an atom consists of positive and negative charges present in equal amounts so that it is electrically neutral. He proposed that the atom was a sphere with charges embedded within it. This model became known as Thomson Atomic Model [1-4].
In 1904, Thomson suggested a model of the atom, hypothesizing that it was a sphere of positive matter within which electrostatic forces determined the positioning of the corpuscles. To explain the overall neutral charge of the atom, he proposed that the corpuscles were distributed in a uniform sea of positive charge.
Jun 29, 2017 · Thomson proposed that the electrons were embedded in a uniform sphere that contained both the positive charge and most of the mass of the atom, much like raisins in plum pudding or chocolate chips in a cookie (Figure \(\PageIndex{6}\)).
Lord Kelvin envisioned the atom as a sphere with a uniformly distributed positive charge and embedded within it enough electrons to neutralize the positive charge. This model was further supported by J.J. Thomson's subsequent discovery of the electron.
