 channel for physics. Please subscribe my channel. Hello and welcome back to another episode of physics partner. Today we are going to discuss Sir J.J. Thomson Plum pudding model. Sir J.J. Thomson presented to the world the first atomic model that is the plum pudding model which appeared in a paper published in the Philosophical magazine in March 1904. What is plum pudding model? Plum pudding is actually an English dessert similar to a blueberry muffin. In Thomson's plum pudding model of the atom the electrons were embedded in a uniform sphere of positive charge like blueberries stuck into a muffin. Because of this resemblance it is considered as plum pudding model. The positive matter was thought to be jelly like or a thick soup. The electrons were somewhat mobile as they got closer to the outer portion of the atom the positive charge in the region was greater than the neighboring negative charges and the electron would be pulled back more towards the center region of the atom. Let's talk about the postulate of plum pudding model. Thomson's atomic model postulates that an atom resembles a positive charge sphere with electrons negatively charged particles present within the sphere because the magnitude of the positive and negative charges is equal and atom has no charge overall and is electrically neutral. Now let's talk about the limitation of this theory. This theory failed to explain atomic stability because his atomic model was unsuccessful to explain how operative charge holds negatively charged electrons in an atom. As a result this theory also failed to account for the nucleus position in an atom. Thomson's model was unable to account for the scattering of alpha particles by thin metal foils as well. Moreover there is no experimental evidence to back it up. Why it is very important to study sir JJ Thomson plum pudding model. Even though Thomson's atomic model was inaccurate and had a few drawbacks it provided the base for several other atomic structures model afterwards. It is one of the foundation model that led to significant and revolutionary inventions later. That's why JJ Thomson model has its own importance. It was a small video for you. I hope you enjoyed the video. Thank you very much for listening. Take care of yourself. See you in the next video. Goodbye.