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What are the limitations of Rutherford's...

What are the limitations of Rutherford's model of the atom ?

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The major limitation of Rutherford's model of the atom is that it does not explain the stability of the atom. This will become clear from the following discussion. In Rutherford's model of the atom, the negatively charged electrons are revolving around the positively charged nucleus in circular paths. Since the direction of motion of electrons moving in circular paths changes continuously, therefore, the motion of electrons moving around the nucleus is accelerated. Now, according to the electromagnetic theory of physics, the charged electrons undergoing accelerated motion around the nucleus will lose their energy continuously by radiation. The speed of electrons will, therefore, go on decreasing, they will be attracted more strongly by the oppositely charged nucleus, they come more and more close to the nucleus adn ultimately fall into the nucleus by taking a spiral path. This should make the atoms very unstable due to which the atoms should collapse quickly. This, however, does not happen. The electrons do not fall into the nucleus, atoms are very stable and do not collapse on their own. The Rutherford's model, however, does not explain this stability of an atom.
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LAKHMIR SINGH & MANJIT KAUR-STRUCTURE OF ATOM-Exercise
  1. Compare the properties of electrons, protons and neutrons.

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  2. What are the limitations of J.J. Thomson’s model of the atom?

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  3. What are the limitations of Rutherford's model of the atom ?

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  4. Describe Bohr's model of the atom.

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  5. Compare all the proposed models of an atom given in this chapter.

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  6. Summarise the rules for writing of distribution of electrons in variou...

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  7. Define valency by taking examples of silicon and oxygen.

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  8. Explain with examples (i) Atomic number (ii) Mass number (iii) Isotope...

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  9. Na^(+) has completely filled K and L shells. Explain.

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  10. Bromine occurs in nature mainly in the form of two isotopes Br(35)^(79...

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  11. A sample of an element X contains two isotopes .(8)^(16)X and .(8)^(18...

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  12. If Z = 3, what would be the valency of the element? Also, name the ele...

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  13. Composition of the nuclei of two atomic species X and Y is given as un...

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  14. For the following statements, write T for true and F for false : (a)...

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  15. Rutherford's alpha particle scattering experiment led to the discovery...

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  16. Isotopes of an element have : (a) the same physical properties (b)...

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  17. Number of valence electrons in Cl^(– ) ion are:

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  18. Which one of the following is a correct electronic configuration of so...

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  19. Complete the following table :

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  20. Imran and Rohan are best friends. They study in different schools in S...

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