Thomson’s Atomic Model
Thomson’s Atomic Model was proposed by J.J. Thomson in 1904, following his discovery of the electron in 1897 after his famous cathode ray experiment. The model is also known as the Plum Pudding Model. In this model, Thomson proposed that atoms are composed of a positively charged sphere with negatively charged electrons embedded within it. The positive charge of the sphere was thought to be uniformly distributed to balance out the negative charge of the electrons. The electrons were held in place by electrostatic attraction to the positive sphere.
The model explained certain experimental observations of that time that atoms were electrically neutral and that cathode rays were negatively charged. The atomic model was later discarded as it was unable to explain the various results concluded by various scientists after their experiments such as it was unable to explain the existence of the nucleus whose existence was confirmed by Rutherford in his experiment.
Plum Pudding Model
Thomson Atomic Model is also called the Plum Pudding model as it represents the Plum Pudding. According to Thomson, an atom represents a sphere of radius of magnitude in Angstrom. (10-10). In this sphere, the positive charge is spread uniformly and the negative charge is embedded in this positive charge due to electrostatic attraction between the charge. The magnitude of the positive and the negative charge in the sphere is equal according to Plum Pudding Model.
Thomson’s Atomic Model
Thomson’s Atomic Model is one of the fundamental models of the atom that tries to explain the working and structure of the atom. this model was proposed by famous Scientist JJ Thomson in 1904. Thomson during his cathode ray experiment proved the existence of a negatively charged particle called electron that exists inside the atom. And after complaining about his result he prosed the Thomson atomic model also called Pulm Pudding Model.
In this article, we will learn more about, Thomson Atomic Model, its postulate, and its limitations in detail.