Question

Which observation by Ernest Rutherford and his students refuted the plum pudding model? (1 point)

alpha particle deflection

electron attraction

electron deflection

O alpha particle attraction

Answer 1

The observation by Ernest Rutherford and his students that refuted the plum pudding model was **alpha particle deflection**. This was demonstrated in Rutherford's gold foil experiment, where alpha particles were fired at a thin sheet of gold and were found to be deflected at large angles, suggesting the presence of a dense nucleus, which contradicted the plum pudding model that proposed a diffuse distribution of positive charge.