what was thomson's model of an atom? why was it rejected
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J.J. Thomson assumed that the positive charge of an atom was all one uniform blob of matter with the electrons moving in orbits inside the nucleus.
But in 1911, Rutherford showed that Thomson's model was wrong because the distribution of positive and negative particles was not uniform. Rutherford showed that the atom contains a small, massive, positively charged nucleus.
But in 1911, Rutherford showed that Thomson's model was wrong because the distribution of positive and negative particles was not uniform. Rutherford showed that the atom contains a small, massive, positively charged nucleus.
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•J.J Thomson's model can be imagined as watermelon of positive charge and seeds(electrons,negatively charged)..fitted into it...
•An imp feature of this model is that the mass of the atom is assumed to be 'uniformly' distributed over the atom..
•But in alpha-particle scattering expt..
A few alpha particles were deflected..
The deflection must b due to stronger repulsive force...
-showing that positive charge of atom is not spread throughout the atom..Thus J.J thomson's expt got rejected..
•An imp feature of this model is that the mass of the atom is assumed to be 'uniformly' distributed over the atom..
•But in alpha-particle scattering expt..
A few alpha particles were deflected..
The deflection must b due to stronger repulsive force...
-showing that positive charge of atom is not spread throughout the atom..Thus J.J thomson's expt got rejected..
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