Question

Demerits of Thomson and Rutherford atomic theory

Answer 1

According to J.J. Thomson’s model of an atom, an atom consists of a positively charged sphere with electrons embedded in it. However, it was later found that the positively charged particles reside at the centre of the atom called the nucleus, and the electrons revolve around the nucleus.
According to Rutherford’s model of an atom, electrons revolve around the nucleus in fixed orbits. But, an electron revolving in circular orbits will not be stable because during revolution, it will experience acceleration. Due to acceleration, the electrons will lose energy in the form of radiation and fall into the nucleus. Hence the atom would be highly unstable and would eventually collapse.

Answer 2

Answer:

Explanation:

demerits -

 

1) Rutherford's atomic model fails to explain the reasons behind stability of atom.

2)Rutherford's model fails to explain the formation of different lines in the line spectrum of atoms.

3) Rutherford compared his model with planetory system. But it is not correct because the attraction force between sun and planet is gravitational force.But It is electro static force between nucleus and electron.

merits-  

1) rutherford discovered the prescence of nucleus in atom by his experiment.

2) Rutherford assumed that most of the atom is hallow and small centre point called nucleus.

3) he imagined that electrons revolve around nucleus like planets around sun.

4) In this way he got nobel prize to his discovery.

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