Did Thomson proposed an atomic model with a nucleus?
J. J. Thomson, who discovered the electron in 1897, proposed the plum pudding model of the atom in 1904 before the discovery of the atomic nucleus in order to include the electron in the atomic model.
What is JJ Thomson atomic model?
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.
Did Thomson’s model say anything about protons?
Thomson in 1897. The existence of protons was also known, as was the fact that atoms were neutral in charge. Since the intact atom had no net charge and the electron and proton had opposite charges, the next step after the discovery of subatomic particles was to figure out how these particles were arranged in the atom.
What did JJ Thomson call his model of the atom?
J.J. Thomson was the first to discover the subatomic particle called electron in 1904. The model he proposed was named as ‘plum pudding model of the atom”. But in 1911, Ernest Rutherford came up with a new model for the atom after his discovery of the atomic nucleus in 1909.
What are the advantages of JJ Thomson model?
The only advantage is that it is a very simple visual model of an atom proposed by J. J. Thompson in the early 1900’s. His model of the atom consisted of a large cloud of positive matter with imbedded negative particles making the overall mass neutral.
What was JJ Thomson’s theory on atoms?
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 discovery upended the prevailing theory that the atom was the smallest fundamental unit.
How did JJ Thomson contribute to the atomic theory?
Thomson contributed to the model of an atom by discovery of electrons and thus proving the existence of sub-atomic particles in an atom. Thomson used cathode ray tube, and demonstrated that cathode rays were negatively charged.