jj thomson cathode ray tube experiment demonstrated that

Thus it should move in a spiral path and should emit continuous spectrum and thus structure atom is not stable. therefore, it should approach nearer the nucleus while going round emitting radiations of increasing frequency and finally falling in the nucleus. Therefore, theĮlectron should radiate energy while going round the nucleus losing its energy continuously. The negatively charged electrons revolve around the nucleus in a circular orbit, hence they possess centripetal acceleration. According to the classical theory of electromagnetism, accelerated charge radiates energy continuously.Limitations Of Rutherford’s Atomic Model: Rutherford’s model of an atom is also called as a planetary model of an atom. Around the nucleus, there is empty space in which the negatively charged electrons revolve in different orbits. The whole mass of an atom is concentrated in the nucleus. The atom consists of the centrally located positively charged nucleus. The rest of the portion of the atom should be empty.įrom the observations of his experiment, Rutherford put forward the concept of his atomic model. He called this centrally cored and positively charged region of an atom as a nucleus.

It is due to the positive charge present in a very small space within the atom. Hence there must be empty space in the atom. Based on the experiment Rutherford concluded that most of the alpha particles having positive charge went through the foil undeflected.This concludes that the nucleus is very small as compared to the volume of the atom.

Very few alpha particles were rebounded i.e.

This massive +ve charge is at centre of an atom and called nucleus.

Very few rebounded back This larger deflection is possible only if α-particles collide with heavy and positively charged particles inside the atom because like charges only repel each other.

A few alpha particles deviated through larger angles.

A few alpha particles were deflected through smaller angles.

Most of the alpha particles just passed through without any deviation as if there is empty space.

Jj thomson cathode ray tube experiment demonstrated that