Question

Describe J.J Thomson's atomic model.

Answer 1

Thomson Atomic model (Plum pudding model):

1. Given by J.J. Thomson.
2. Postulates:

1. An atom is like a sphere of positive charge in which electrons are embedded like the dry fruits are embedded in a plum pudding or seeds are embedded in a watermelon.
2. The positive and negative charges are equal in number and thus, an atom is electrically neutral in nature.

3. Drawbacks or Limitations:

1. It didn’t explain how the positive and negative charges are held in the atom.
2. It does not explain the stability of the atom.
3. It didn’t explain Rutherford’s scattering experiment.