Question

Stability of an atom was successfully explained by Rutherford’s atomic model.
(A) True
(B) False

Answer 1

Hint: Rutherford’s atomic model first time showed the presence of nucleus in the centre of the atom.
- According to Rutherford's model, electrons lose their energy continuously in the form of electromagnetic radiation and finally merge in the nucleus. The electron revolves in a helical path around the nucleus.

Complete Solution :
Stability of atoms was explained by Bohr's atomic model. Rutherford proposed an atomic model on the basis of an α-scattering experiment but he could not explain the stability of atoms. The Rutherford model is known as the nuclear atomic model, according to his model the electron revolves around the nucleus in a close orbit with very high speed and loses its energy continuously in the form of radiation. In Rutherford model an atom finally should have collapsed in the nucleus in a very short period of time.
His model explained the size and presence of the nucleus in the atom, but failed in the explanation of stability of nucleus so, the above statement is false.
- Bohr’s model explained the stability of atoms. His model was based on the quantum theory of radiation and classical law of physics. He said electrons revolve around the nucleus in stationary orbit or shell in the same way as the planet revolves around the sun. The energy of these orbits always remains constant and each orbital is associated with a fixed amount of energy.
So, the correct answer is “Option B”.

Note: Electrons do not emit energy continuously in the atom.
-Electrons revolve in a circular path around the nucleus.
-Bohr’s model was based on the particle nature of electrons.
-Bohr’s model was applicable for a single electron species.