The vast majority of alpha particles pass straight though a piece of metal foil as if it was not there. Some alpha particles are deflected (scattered) by an angle of about 1o as they pass through the metal foil.
Can alpha particles pass through foil?
Most of the alpha particles did pass straight through the foil. The atom being mostly empty space. A small number of alpha particles were deflected by large angles (> 4°) as they passed through the foil.
Which particles are passed through the gold foil?
In Rutherford's gold foil experiment of most of the alpha particles were passed right through the foil without any deflection.
