Explain plum pudding model given by J.J thomson
with its limitations(drawbacks)
Answer: THOMSON’S MODEL OF AN ATOM :
J.J. Thomson proposed his model of the atom in 1903. Thomson proposed it to be similar to that of a Christmas pudding. The electrons, in a sphere of positive charge, were like currants (dry fruits) in a spherical Christmas pudding. We can also compare it with watermelon, the positive charge of the atom is spread all over like the red edible part of the watermelon, while the electrons(negatively charged) are embedded in the positively charged sphere, like the seeds in the watermelon.
Depending upon his model he gave the following postulates:
J.J. Thomson proposed his model of the atom in 1903. Thomson proposed it to be similar to that of a Christmas pudding. The electrons, in a sphere of positive charge, were like currants (dry fruits) in a spherical Christmas pudding. We can also compare it with watermelon, the positive charge of the atom is spread all over like the red edible part of the watermelon, while the electrons(negatively charged) are embedded in the positively charged sphere, like the seeds in the watermelon.
Depending upon his model he gave the following postulates:
- The atom consists of a positively charged sphere and the negatively charged electrons are embedded in it.
- The negative and positive charges are equal in magnitude. So, the atom as a whole is electrically neutral.
- Although he explained the stability of the atoms that the atoms are electrically neutral, the result of experiments carried out by other scientists could not be explained by this model.