Question

Why Rutherford got unexpected results from his experiment???

Answer 1

he expect that alpha particles would deflect by sub atomic particles in gold atoms

since alpha particles were much heavy than protons

he did not expect to see large deflection

Answer 2

Answer:

According to Thomson's atomic model, electrons were embedded in a sphere of a positive charge. This implies that according to Rutherford's gold foil experiment in which the alpha particles which are positively charged must be reflected or deflected in large numbers but after performing the experiment, it was being found out that most of the space inside an atom is empty which was contrary to that predicted in Thomson's model. Hence, Ernest Rutherford got unexpected results from his experiment