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Compare the models of an atom proposed by Thomson, Rutherford andNeils Bohr.

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ThomsonRutherfordNeils Bohr
An atom consists of a sphere of positive charge with negatively charged electrons embedded in it.There is a positively charged, dense center in an atom called the nucleus.Nearly the whole mass of an atom resides in the nucleus.Only certain special orbits known as discrete orbits of electrons are allowed inside an atom.
The positive and the negative charge in an atom are equal in magnitude due to which an atom as a whole is electrically neutral.The electrons revolve around the nucleus in a circular path.While revolving in discrete orbits the electrons do not radiate energy.
The size of the nucleus is very small as compared to the size of an atom.


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