What happened to most alpha particles in the gold-foil experiment?

In the famous gold-foil experiment conducted by Ernest Rutherford and his associates, the vast majority of alpha particles passed straight through the gold foil without being deflected.123

This observation was significant because it implied that atoms are composed primarily of open space, offering no resistance to the passage of the particles. While most particles traveled through unimpeded, a small fraction experienced slight deflections, and a very few were scattered at large angles or bounced back toward the source. These rare, large-angle deflections led Rutherford to conclude that the atom contains a tiny, dense, and positively charged nucleus where nearly all of the atom's mass is concentrated.142