The model has also been compared to a watermelon because the red edible part of a watermelon was compared to the sphere having a positive charge and the black seeds filling the watermelon looked similar to the electrons inside the sphere. It resembles a plum pudding because the electrons in the model look like the dry fruits embedded in a sphere of positive charge just like a spherical plum pudding. Thomson’s atomic model resembles a spherical plum pudding as well as a watermelon.The positive and negative charge is equal in magnitude and therefore an atom has no charge as a whole and is electrically neutral.According to the postulates of Thomson’s atomic model, an atom resembles a sphere of positive charge with electrons (negatively charged particles) present inside the sphere. You can download Structure of Atom Cheat Sheet by clicking on the download button below Learn about Charged particles in Matter in more detail here.
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