Question

What do you think would be the observation if the $\alpha$ particle scattering experiment is carried out using a foil of a metal other than gold?

Answer 1

If the $\alpha$-scattering experiment is carried out using a foil of a metal rather than gold, there would be no change in the observation.

In the $\alpha$-scattering experiment, a gold foil was taken because gold is malleable and a thin foil of gold can be easily made.

It is difficult to make such foils from other metals.