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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.
Thomson atomic model was 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.
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].
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.
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.
In Thomson's model of the atom, where were the electrons? What was the positive charge in this model? What kept the electrons in the atom? Whose model replaced Thomson's? What awards did Thomson receive?
Thomson atomic model 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. (more)
In 1897, J. J. Thomson discovered the first subatomic particle, the electron, while researching cathode rays. To explain the neutrality of atoms, Thomson proposed a model of the atom in which negative electrons are scattered throughout a sphere of positive charge. He called his atom the plum pudding model.
The Thomson Model of the Atom. In 1897, J.J. Thomson discovered the electron, the first subatomic particle. He also was the first to attempt to incorporate the electron into a structure for the atom. The internal structure of the atom had been a source of speculation for thousands of years. The Greeks taught that the atom was solid, as did Dalton.
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.