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Ernest Rutherford was tpld to look for alpha
particle scattering at large angles which came out to be true and contradicting with J J Thomsons model. Rutherford
described it as the most incredible event of his life,
"as if you fired a 15-inch shell at a piece of
tissue paper and it came back and hit you."
huge deflections could not be explained by Thomson's
model of the atom, where charge was distributed evenly
throughout the atom. For such large deflections all
the positive charge had to be concentrated in a small
mass greater than the mass of the alpha particles.Its therefore not true that Plum pudding model was approved
The correct answer is 4. The plum-pudding model was proven correct in experiments by Ernest Rutherford. Please let me know if you need any clarification. I'm always happy to answer your questions.