What are the postulates of Rutherford? What are his drawbacks ?
$$\text{Postulates of Rutherford's atomic model:}$$
(1) +ve charge is concentrated in the center of the atom called nucleus.
(2) Electron revolved around the nucleus in circular paths called orbits.
(3) The nucleus is much smaller in size than the atom.
$$\text{Drawbacks of Rutherford's atomic model:}$$
(1) The orbital of the electron is not expected to be stable.
(2) According to Rutherford's model, electrons while moving in their orbit would give up energy. This would make them slow down gradually and move towards the nucleus. Electron will follow a spiral path and then fall into the nucleus. Ultimately the atom would collapse. But in reality the atom is stable.